I have stains that I believe are mildew on my convertible top. I have been able to get them to go away but they won't stay away. They appeared a few years ago when I was forced to park under a tree for a weekend.

Does anyone know of anything that can knock this problem out?

The only thing that will make them fade is Shout fabric stain remover, but it requires vigorous scrubbing, which I think attacks the fabric, and the stains come back in a week or so.

Has anyone ever tried steam cleaning, or carpet spot removers on the top?

If I could get my hands on some Trimethylethylene, that would knock it out.

 

Raggtopp products are what you need, they have a cleaner spray and a sealer to keep staining from happening again.