I'm having the same problem as you .Slug slime on our vinyl siding . I've been looking and looking as to how to clean it up and as yet have no answers. If by chance you have found the answer I would deeply appreciate you letting me know. Thank--you

I have the same problem. Is there something safe to remove it?

We had this problem too...even called out a power washing company. After using about 4 different super strength cleaners from Lowe's, my husband was able to scrub off most of the slug stains with an industrial strength cleaner that he got from our exterminator. Who knew slugs could cause such damage???

I ran a “scientific experiment” cleaning sections of aluminum siding with white vinegar, WD-40, industrial cleaner, bleach, tile and grout cleaner, and Murphy’s Oil Soap. I learned that scrubbing works best using a combination of 2.5 gallon of warm water with ½ cup bleach, ½ cup trisodium phosphate (TSP), and ¼ cup borax. I scrubbed twice with cleaning solution, scrubbed once with clean water, and rinsed down the section before moving on to another section.