[Perfectlap]

it's a big nono because you should never put car wash detergent on your soft top. That's for paint only. You should use Ragtopp to wash the canvas top. Using soap burries dust into the canvas fibers and with the up and down movement of the top the threads starts to crease and fray.

Buy some Optimum No-Rinse (1 ounce in 1 gallon of water) and wipe down your car with a waffle weave towel. There are plenty of YouTube videos of this including one guy with a Ferrari 360. I don't recommend washing with suds too often, you'll wreck the paint. Too much contact.