How to clean vinyl tops?

I picked up a bunch of old cargo covers and trailer tops that are old and dirty. Any tips on how to clean these would be appreciated.

Kaboom no drip foam mold and mildew remover sold at wally world. They have different kaboom's ( tried a different one as I ran out and not as good) but this one is amazing. Spray and let it do its thing. Wait and hose off before dry. No elbow grease needed.

I did my hmmwv soft doors, cargo top, 4 man top, 2 man top even the hood. I am sold

I had good results with simple green and a broom. Laid them out, presoaked with water, sprayed the simple green on, scrubbed with a regular broom and rinsed. Plus the simple green isn't too harsh on the ground. I use a broom, being too tall to be hunched over scrubbing.

Originally engineered for aerospace and aviation applications, 303 Protectant is a premium surface treatment that instantly beautifies and provides superior protection against harmful UV rays that can cause discoloration, fading, embrittlement, cracking and/or chalking of surfaces.