I live on a river in NE North Carolina. Each year I cleanup my pontoon boat seats. Despite a cover they get some debris, mold,etc. The debris and mold typically are treated with Wal Mart spray liquid that has a little ammonia in it. It’s been working fine for 10-15 years. This year the debris mold was a bit heavier than normal and my normal treatment of the vinyl seating ( all white)is not working. One of my neighbors suggested using Mr Clean type sponges and that doesn’t work Wonder if the board members have ideas or recommendations? Thanks