So I have been using lady bugs for quite awhile now. The last batch I threw in died super fast (about a week or 2) and I wanted to know why that could possibly be? Also I am using them in a grow tent to combat spider mites. But after about 3 months they died off, then mites returned with about another 3 months. Why are the mites returning? I've done 2 rounds of lady bugs thus far. Any input would be great