So im out in the garage today to get the hhr ready for winter. I figured id go ahead and try out my onr sense ive had it all summer and never touched it. Put in some cap fulls of solution with a couple gallons of water and used a grout sponge for the first time. Id have to say I felt retarded and scared at the same time. I felt like I was using way to much water becuase it was everywhere and the sponge made this awful screeching whoosh sound across the paint. Made me feel like I was scratching the crap out of it. Any tips? My sponge is now the color of dirt, are these things supposed to rinse clean like new?