So I am using those terra cotta saucer things for the water dish. I usually change the water or refill it every day or two occasionally I would pick up the dish and I notice there is this slime feeling on the bottom of the saucer and sometimes within it as well. Not sure what this is exactly and if this is harmful for the tortoise... I usually just clean it and reuse it but just wondering if I have to do drastic things like sterilize the saucers or something. I forgot to mention, I am also using dish detergent and scrubbing pad to clean it... I rinse it good and let it air dry for a few days (Have multiple saucers to switch out) since it is porous and what not...