What is the best way to remove mold from aluminum siding?

Dawn dish soap ,water and vinegar.

I spray pool chlorine on the siding, rinse, repeat when needed. You can scrub the area with a bristle brush if you think necessary, but let the chlorine work and it will clean the siding for you. Best of luck.

I agree with Diane. Use pool chlorine. Fill a garden pump sprayer with chlorine and water and use it on the area that needs cleaning. After letting it sit, rinse well.

Thank you all ladies for the input. I'll try the chlorine method first. If that doesn't do the trick, I'll fall back on the dawn way. Thank you again.

Although I don't have mold on my aluminum siding I do get a lot of bird 'residue' on the house, due to the feeders I have outside my kitchen window. What has worked great for cleaning is a mix of ammonia and water which I scrub on with a scrub brush. Works like a charm!

There is a solution that is available in hardware & garden stores , named Wet & Forget, I was advised to use this, hav'nt tried it as yet, but was told that it works.

I agree with these methods to get rid of the mold. But more importantly, you need to find the source so that the mold does not return. After cleaning, I recommend using Kilz products to be applied where the mold was growing. It only takes one cell left behind for the mold to return. Good luck.

I agree with all the solutions mentioned, is this area in a shady spot? If so see if t can be altered so the sun's rays can reach it. Typically mold likes dark, moist places to grow.