I tried to clean the first one for a while, but I can't figure out what the cleaning solutions are supposed to do in the different buckets. I kept going over it again and again with all of the tools, holding my mouse in one spot, moving it in circles, using different tools and cleaning supplies, but I just couldn't figure out how to get the different parts clean. I only ended up cleaning a small bit of the outside of that first one.
Really cute concept, love these kinds of games, I just need more info on what the material types are and what the cleaning solutions are for.