we try to do our snakes weekly ( I got to try and get time to start some today since we been so busy planning the wedding and such for sunday(for friends and family) but tomorrow is the one she wants for the date.
but i try to clean the tubs and everything every week in somes cases i need to clean them 2-3 times a week. specially if someone sheds or manages to get the papertowels in the water bowl lol. it then wicks all the water out of the bowl and all over the tub bottom.