HI, I'm currently using paper towels on the bottom of the tubs because im not really a fan of wood substrates cause im told there is a significant risk of splinters and other injuries etc and i dont want to have to deal with that. i have not tested my humidity levels yet but im going to get a hygrometer online today but if my humidity levels are too low what should i do? can i just mist the paper towels? ideas please. thanks