Stain removal from vinyl

Any helpful hints on removing a few small dark stains (mildew?) from my vinyl?

My barn roof does leak some water, and where the cover sits on the back deck apparently traps some moisture. Any hints appreciated.

Thanks

Spray nine works well

I use a 50/50 mix of water and bleach. Kills the mildew every time. (My interior is white, so be careful if yours is not).

Fantastik is the recommonded cleaner. If stubborn stains are persistant, use a soft brisstle hand brush and elbow grease. Some cleaners, contain petroleum distilates(vinyl protecters to), which will dry rot the vinyl from the inside out. Make sure to read the label. Brian Raymond