Use a sprayer attachment if you have one and spray the gutters from the ground to rinse them.
How to wash aluminum gutters.
For that mix half cup of household liquid detergent with a half cup of bleach in two gallons of water.
Spray a five to ten foot section at a time because otherwise the gutters may dry before you have cleaned them.
If you have aluminum gutters you ll want to be careful when choosing a chemical as some may cause aluminum to corrode.
Use this solvent to scrub off the outer surface of your gutters with a stiff brush or a piece of cloth.
On a windy day some of the spray might fly back into your face and you don t want this stuff in your eyes.
Aluminum readily welcomes a solution of warm water and acetic acid more commonly found in the kitchen as white vinegar after scooping the gunk from your gutters with the trowel mix a bucketful of solvent using 1 cup of vinegar for every 3 gallons of water.
It attacks the oxidation and not the paint or material.
Once the mixture is applied to the gutters let it stay for 10 15 minutes before rinsing it off with a garden hose and a nozzle sprayer.
F 13 gutter grenade is a multipurpose gutter cleaner that s safe for all types of gutters.
Turn the nozzle on the bottle to clean.
Another option is to spray the gutters down entirely at the beginning so that you can turn the hose off.
Simple green makes a concentrated environmentally safe cleaner with good stain removing properties.
For aluminum try gutter zap which removes electrostatic bonded streaks with little scrubbing.