Originally Posted by JARblue

They can swear all they want. They're still scratching the hell out of their paint. A sponge will retain dirt particles after one wipe and rinse in your rinse bucket. These remaining particles will scratch your paint on the next wipe. This is why you need a proper wash mitt that will actually release all dirt particles into the rinse bucket. And you need a grit guard at the bottom of said bucket to keep the dirt at the bottom and the rinse water clean.

And $1.50 for single use is pretty outrageous for something that is going to damage your paint. I paid $15 for a nice lambswool wash mitt that'll I'll get far more than 10 uses out of (with proper cleaning after each use).