Hi! Thank you for your feedback<3 The mechanics could definitely be a little more intuitive and better readable hahah when you have the sponge selected, you need to left click on the different cleaning solutions to change the effect of the sponge. The sponge then turns green, blue, or pink and is effective against different materials of the carriage (the different materials can be a little hard to differentiate, but mostly you can figure it out quite fast by trial and error). Then with the towel and sewing kit you can fix fabric and polish metal (e.g. on the first carriage the gold and pink parts) to make it even cleaner! i hope that helps! :3