Proven: How to Get Tar Out of Microwave Safely

Immediate Action (First 5 Minutes)

I'll be honest, when my nephew asked me how to get tar out of microwave, I thought he was pulling my leg. He was trying to soften pine tar for his baseball bat grip, and the plastic container tipped over at 110 degrees. Tar is a complex mixture of hydrocarbons, and when it melts, it bonds to the enamel interior of your appliance like absolute concrete. You need to act fast, but you also need to protect your skin and your lungs.

Hot tar sticks. It causes severe burns if you touch it before it cures. The very first thing you must do is unplug the microwave from the wall. Don't just turn it off. Unplugging it prevents anyone from accidentally hitting the 'Add 30 Seconds' button, which would spin the turntable and smear that boiling black sludge all over the interior walls.

Next, open your kitchen windows and turn on the exhaust fan. Melting tar releases volatile organic compounds (VOCs) that smell like a freshly paved highway in July. If you have kids who track mud everywhere and are currently running around the house, get them out of the kitchen immediately. The fumes aren't highly toxic in small doses, but they will cause a massive headache. Let the appliance sit completely untouched for at least 45 minutes. You want that tar to cool, harden, and become brittle before we even think about attacking it.

What You'll Need (Tools and Products)

This isn't the cheapest cleaning job, but buying the right solvents saves you from ruining a $200 appliance. I've tested dozens of degreasers over my 10 years of cleaning homes, and standard dish soap just won't cut it here. You need products specifically formulated to break down petroleum and pine resins.

Item	Brand/Model Recommendation	Estimated Cost	Why I Recommend It
Plastic Putty Knife	Stanley 10-099 1.5-inch	$3.98	Won't scratch the microwave enamel or glass turntable.
Citrus Solvent	Goo Gone Original Liquid	$8.49	The d-Limonene breaks down pine tar bonds rapidly.
Heavy Duty Degreaser	Dawn Platinum Powerwash Spray	$6.97	Emulsifies the oily residue left behind by the solvent.
Microfiber Cloths	Chemical Guys Professional Grade	$12.99 (pack)	Traps the black sludge without smearing it around.
Nitrile Gloves	Grip-Rite 5-mil Black	$14.98 (box)	Tar stains skin for weeks; these block the dye completely.

Gather all these supplies before you start. Once you begin wiping, you don't want to stop and run to the garage for a scraper. Keep a trash bag right next to you on the counter. The cloths will get ruined instantly, so you'll be throwing them away rather than washing them.

Step-by-Step Removal

I'll be honest, this takes elbow grease. You won't just wipe it away in two seconds. Tar is stubborn, and it requires a multi-stage chemical attack to lift it safely from the interior cavity. Follow these exact steps to restore your microwave.

Step 1: The Ice Hardening Technique

Grab a ziplock bag and fill it with ice cubes. Press this ice pack directly against the largest puddles of hardened tar for about 8 minutes. The extreme cold drops the temperature of the resin below its glass transition point, making it incredibly brittle. This is a trick I learned from auto detailers removing asphalt from car paint. It works beautifully on appliance enamel too.

Step 2: The Mechanical Scrape

Put on your nitrile gloves. Take your Stanley plastic putty knife and gently pry under the edges of the frozen tar. It should pop off in thick, satisfying chunks. Drop these chunks directly into your trash bag. Don't use a metal razor blade. Metal will gouge the protective enamel coating, leading to rust and eventual microwave failure. Get up as much of the bulk material as possible before moving to liquids.

Step 3: The Citrus Solvent Soak

Now we tackle the thin, smeared layer that the scraper couldn't grab. Spray a generous amount of Goo Gone directly onto a microfiber cloth. Don't spray it directly into the microwave cavity, as you don't want liquid pooling in the ventilation holes. Press the soaked cloth against the remaining tar stains. Let it sit for exactly 4 minutes. The citrus oils need time to penetrate the hydrocarbon chains.

Step 4: The Aggressive Wipe

After the 4-minute soak, wipe the area firmly in one direction. You'll see the black sludge transfer to the cloth. Flip to a clean side of the cloth and repeat. If the tar is particularly thick, you might need to do this three or four times. Throw the cloth away once it's saturated. Using a dirty cloth just pushes the dissolved tar back into the microscopic pores of the enamel.

Step 5: The Surfactant Degrease

Goo Gone leaves behind a greasy, orange-smelling film. You must remove this before heating food again. Spray Dawn Platinum Powerwash all over the interior walls, the ceiling, and the glass turntable. Let it sit for 2 minutes. Wipe it down with a fresh, damp microfiber cloth. The surfactants in the Dawn will bind to the citrus oils and lift them away completely.

Step 6: The Final Deodorizing Steam

Tar smells awful, and solvents smell worse. Fill a microwave-safe glass bowl with 1 cup of water and the juice of one whole lemon. Drop the lemon halves into the water. Microwave on high for 5 minutes. The steam will loosen any microscopic residue, and the lemon oil will neutralize the lingering chemical odors. Wipe the interior dry with a paper towel, and you're done.

Alternative Methods

If you don't have Goo Gone on hand, or if you're dealing with a specific type of tar like roofing pitch, these backup methods work well. I've tested all three in my own kitchen during various DIY disasters.

WD-40 Specialist Heavy-Duty Degreaser

Don't use standard WD-40 lubricant. It leaves a terrible taste and smell that is nearly impossible to remove from food-heating appliances. Instead, use the WD-40 Specialist Heavy-Duty Degreaser in the silver and black can. It contains powerful alkaline builders that saponify the sticky resins. Spray it on a cloth, wipe the tar, and follow up immediately with the Dawn dish soap step to remove the chemical residue.

The Peanut Butter Trick

This sounds crazy, but it works in a pinch. Natural peanut butter is packed with peanut oil, which acts as a mild, food-safe solvent for pine tar. Smear a thick layer of crunchy peanut butter over the stain. Let it sit for 15 minutes. The oils will slowly break down the sticky bonds. Scrape it off with your plastic putty knife and wash the area with hot soapy water. It's messy, but it's completely non-toxic.

Mineral Spirits (For Roofing Tar Only)

If someone accidentally put actual roofing tar or driveway sealant in your microwave, citrus cleaners might fail. You'll need mineral spirits. Apply it with a cotton ball, wipe the stain, and immediately remove the cotton. This isn't the safest option for a kitchen appliance due to the intense fumes and flammability. If you use this method, you must leave the microwave door open in a well-ventilated room for 48 hours before using it to heat food again.

Prevention Tips

When your landlord inspects next week, you don't want to be explaining why the inside of the microwave looks like a chimney sweep's nightmare. Prevention is vastly easier than spending two hours scrubbing hydrocarbons.

First, stop microwaving tar altogether. If you need to soften pine tar for sports equipment or melt beeswax and pine pitch for camping gear, use a double boiler on your stove. Place a glass jar inside a pot of simmering water. It heats the material gently, evenly, and completely eliminates the risk of a volcanic boil-over.

If you absolutely must use the microwave for a messy DIY project, line the entire glass turntable with a heavy-duty silicone baking mat. Buy a mat that is at least 12x16 inches, like the Gorilla Grip silicone sheet. It will catch any spills, and you can just peel the hardened tar off the silicone later. Never heat sticky resins in unsealed plastic containers, as they will warp and dump their contents onto the floor of the appliance.

FAQ

Is it safe to use the microwave for food after cleaning tar?

Yes, it is completely safe as long as you thoroughly degrease the interior with dish soap and run the lemon steam cycle. The soap removes the toxic solvent residues, while the steam ensures no chemical odors remain in the ventilation system. Always smell the interior before cooking your first meal.

Can I use Easy-Off oven cleaner to remove the tar?

I strongly advise against using caustic oven cleaners like Easy-Off inside a microwave. These products contain sodium hydroxide, which can permanently etch the glass turntable and corrode the metal waveguide cover. Stick to citrus solvents and heavy-duty dish degreasers to protect the appliance's delicate internal components.

Will the tar ruin the microwave glass turntable?

Tar won't chemically damage the glass, but scraping it with metal tools will cause permanent scratches. If the tar is baked onto the glass, remove the turntable and soak it in a sink filled with hot water and a cup of Dawn dish soap for 30 minutes. The hot water will soften the resin enough to wipe it away with a sponge.

How do I get the smell of burnt tar out if it smoked?

If the tar actually burned and filled the kitchen with smoke, you need to replace the charcoal grease filter if your microwave is an over-the-range model. For countertop models, leave a bowl of white vinegar inside the unplugged microwave overnight with the door closed. The acetic acid will absorb the lingering smoke particles from the plastic interior walls.