Tested Methods: How to Get Grease Out of Gutters Fast

Immediate Action (first 5 minutes)

Grease in gutters usually comes from kitchen exhaust vents, nearby BBQ smoke, or roof runoff mixing with atmospheric grime. It creates a sticky, black sludge that traps leaves and causes massive clogs. When you spot this greasy buildup, you need to act fast before it hardens into a cement-like paste.

First, grab a sturdy ladder and a pair of thick nitrile gloves. I always use the Wells Lamont 1132L gloves because they grip wet aluminum well. Scoop out the loose, chunky debris by hand. Toss it into a 5-gallon bucket lined with a heavy-duty trash bag. Don't let this gunk wash down your downspout. It will just clog the underground drainage pipes.

Next, spray the remaining greasy film with a heavy-duty degreaser. I keep a bottle of Zep Heavy-Duty Citrus Degreaser in my truck. Spray it directly onto the grease spots. Let it sit for exactly 5 minutes. This initial dwell time breaks the surface tension of the oil. It makes the deep cleaning steps infinitely easier later on.

What You'll Need (tools/products)

I've tested dozens of chemicals and tools on aluminum and vinyl gutters over the last decade. This specific kit works best without stripping the paint or pitting the metal. Expect to spend about $85 to $110 if you're starting from scratch.

• Heavy-Duty Degreaser: Zep Heavy-Duty Citrus Degreaser or Simple Green Oxy Solve ($12-$18 per gallon).
• Stiff Bristle Brush: The Libman 12-inch Deck Brush has stiff polypropylene bristles that scrub grease without scratching aluminum ($14).
• Gutter Scoop: A plastic Amerimax Gutter Getter scoop ($6). Metal scoops will scratch your gutter finish.
• Pressure Washer: A gas or electric model with at least 2,000 PSI. I use the Ryobi 2300 PSI Electric Pressure Washer ($299).
• Gutter Cleaning Wand: The STYDDI 40-inch Angled Wand ($25). It saves your back from constant ladder repositioning.
• Safety Gear: Safety glasses, nitrile gloves, and a stable fiberglass ladder.

Step-by-Step Removal (4-7 steps)

Getting grease out of gutters takes some elbow grease. I'll be honest, this isn't a quick 10-minute wash. But following these exact steps guarantees a spotless channel.

1. Clear the Bulk Debris

Use your plastic gutter scoop to remove leaves, pine needles, and loose sludge. Work from the downspout outward. Pile the muck into your bucket. If the grease is mixed with wet leaves, it forms a dense mat. You have to physically break this mat apart with your hands or the scoop.

2. Apply the Degreaser Solution

Mix your citrus degreaser with warm water in a pump sprayer. I use a 1:4 ratio of degreaser to water. Pump it up to 40 PSI. Spray the entire length of the gutter channel. Make sure you coat the back wall where the roof shingles overhang. The grease loves to hide in that dark corner.

3. Let it Dwell (Crucial Step)

Walk away for 10 to 15 minutes. The chemicals need time to emulsify the baked-on cooking oils and soot. If it's a hot summer day, mist the gutter with plain water every 5 minutes. You don't want the degreaser to dry on the aluminum. Dried degreaser leaves a nasty white streak that is a nightmare to buff out.

4. Scrub the Channel

Take your 12-inch deck brush and scrub the gutter floor. Use firm, overlapping strokes. You'll see the water turn dark brown or black. That means the grease is lifting. Pay extra attention to the seams and end caps. These joints collect the thickest layers of oily grime.

5. Flush with the Pressure Washer

Attach the 40-inch angled wand to your pressure washer. Use a 25-degree green nozzle. Keep the wand tip about 6 inches from the gutter surface. Blast the sludge toward the downspout. The 2,000 PSI stream will cut right through the remaining emulsified grease.

6. Clear the Downspout

Grease and debris always bottleneck at the drop outlet. If water backs up, use a plumber's snake or a high-pressure bladder attachment to clear the pipe. I flush mine until the water runs completely clear at the bottom splash block.

7. Final Rinse and Inspection

Do a final pass with a standard garden hose. Check for any missed greasy spots. If you see a rainbow sheen on the water, hit that spot with a quick blast of undiluted degreaser and a spot scrub.

Alternative Methods (2-3 backup methods)

Sometimes the standard degreaser doesn't cut it. Maybe the grease has been baking in the sun for three years. Or maybe you're dealing with a massive amount of pine sap mixed with the grease. Here are my backup strategies.

Method A: The Boiling Water & TSP Trick

Trisodium Phosphate (TSP) is an old-school cleaner that obliterates organic oils. Mix 1/2 cup of TSP powder into a gallon of boiling water. Carefully pour this mixture directly onto the worst grease patches. The heat melts the fat instantly. The TSP saponifies it. Scrub immediately with a nylon brush. Warning: TSP is highly alkaline. It will kill your grass if it spills over the edge, so lay down a tarp below your work area.

Method B: Dish Soap and Baking Soda Paste

If you don't want to use harsh chemicals, grab some Dawn Platinum dish soap and a box of Arm & Hammer baking soda. Mix them into a thick, gritty paste. Smear this paste over the greasy stains. Let it sit for 20 minutes. The baking soda acts as a mild abrasive while the Dawn breaks down the lipids. Scrub it out with a stiff brush and rinse. This takes longer, but it's totally safe for nearby landscaping.

Method	Cost	Best For	Time Required
Citrus Degreaser	$15	Standard roof runoff & BBQ grease	45 mins
TSP & Boiling Water	$12	Baked-on, hardened grease patches	30 mins
Dawn & Baking Soda	$8	Eco-sensitive yards with delicate plants	60 mins

Prevention Tips

Once you get the gutters clean, you don't want to repeat this chore next month. Grease buildup is preventable if you manage the source.

• Install Gutter Guards: I highly recommend the Gutterglove Pro stainless steel micro-mesh system. It costs about $8 to $12 per linear foot installed. It keeps leaves out, which stops the grease from binding to organic matter and forming sludge.
• Redirect Kitchen Exhaust: If your kitchen hood vents directly onto the roof, hire an HVAC tech to extend the vent pipe past the gutter line. Or, install a baffle filter catchment box at the vent opening.
• Move the BBQ: If your smoker or grill sits right under the eaves, move it at least 10 feet away from the house. Wind carries vaporized grease straight up into the gutter channels.
• Biannual Flushing: Spray the gutters with a light degreaser solution every spring and fall. This stops the microscopic oil layers from polymerizing into a hard crust.

FAQ

Can I use bleach to clean grease out of gutters?

No, bleach is a terrible choice for grease. It disinfects and kills mold, but it does absolutely nothing to break down lipids or cooking oils. In fact, mixing bleach with certain degreasers can create toxic chlorine gas. Stick to alkaline cleaners or citrus-based solvents for oily messes.

Will pressure washing damage my vinyl gutters?

It can, if you use the wrong nozzle or get too close. Vinyl becomes brittle in cold weather and can crack under high pressure. Always use a 25-degree or 40-degree white nozzle. Keep the wand tip at least 8 inches away from the vinyl surface, and never exceed 2,200 PSI.

Why is there grease in my gutters if I don't have a roof vent?

Atmospheric pollution and nearby sources are usually the culprits. If you live near a busy road, diesel exhaust settles on your roof and washes into the gutters. Similarly, neighbors burning trash or using wood stoves can deposit oily soot that mimics kitchen grease.

How do I dispose of the greasy gutter sludge?

Don't dump it in your compost bin or storm drains. The oils will contaminate the local water supply or ruin your compost pile. Scoop the sludge into heavy-duty contractor bags. Tie them tight and throw them in your regular municipal trash bin.