Mite off is a waste of money if you want to treat your snakes for mites (and I would recommend to treat your entire collection not just one snake) you need PAM - Provent-A-Mite http://www.pro-products.com/miteandtemp.html (this will treat all stages of development of mites)
Now also keep in mind that Wild Caught BP does not = mites, since mites are not found in Africa (Ticks are however). So if your BP has mites this means that the mites come from the source where you purchased your BP.
Oh I didnt think of that but I guess that I do not have any mites. I was actualy thinking that was maybe why my female wc want eat. Is it okay to force feed her she is 1050grams?