thanks guys!
tigerlily, i am using papertowel substrate at the moment. maybe i should try newspaper?
as soon as i was able to get rid of all those ants in the cage, i replaced the papertowels with new ones and moved her cage to another part of the living room. i hadn't seen her shed or get in the process of shedding, but i will keep an eye out for that too! i imagine that is quite yummy for the ants.
it just kinda creeped me out, the idea of all those little ants on Medusa! i think i will try out the boric acid for the outside doorways of my house. Yeck! thanks again!