Thanks for your input, I will get a soft brush which fits in my bucket, a 5 gallon bucket which was in my garage with no purpose, it has now been given a purpose, "The Bucket" from which we gather trash, bleach the ends of sewer hoses and utensils which touch the black tank area. Wash the floor and other cleaning needs. It does get a heavy bleach after black tank contact. I have also added terry cloth towels for the jobs needed.
How do you dry or keep spots from forming on the walls of your RV, currently there are spots on the entry side of the trailer. :(