the yoyo's are just plain fun to do,i can sew several circles every nite,and before long they add up.to clean one of mine i layed it on the floor flat on top of a sheet.then i put rubbing alcohol in a spray bottle and misitd it,as i did this i used a clean new sponge and dabbed the dirty spots,the next morning i layed it in the porch to air out. this worked for me,good luck