All I can suggest is if it is on a lose substrate take it off that, and give some anti-biotics so it doesn't get an infection.

I have just changed my plateds diet and now stick to a tight schedule of.

Monday - 10/15 large Crix dusted with Calcium
Tuesday - Fruits (such as different types of berrys and bananana)
Wednesday - Morio Worms (as many as they eat) Dusted with Calcium
Thursday - Fruits
Friday - 10 crix, then topped up with as many morio as they want dusted with Nutrobal
Saturday - Fruits
Sunday - 2 Fuzzy mice (or 2 chunks of chicken the same size as fuzzy mice)