Complete beginner here. I was about to repot my phalaenopsis, so I opened the bag of medium which I was going to use. The bag had some damp inside and there are small pale grey insects crawling all over it. My instinct is to throw it away as these insects are really revolting and I don't want to repot into a nest of I don't know what. Also, the mix seems to have some moss in it, which is in tiny pieces, whereas at the moment it is in plain bark. I seem to remember someone suggesting pouring boiling water over new medium and leaving for 24 hours - do people do this if there are these bugs?