hmm thats it then. i lift away then up or down, cant say ive ever dragged it down or up. dunno why i do that.I've had this with JT's, Profilers and events - pretty much all the masks I've had.
it happens when you have the mask on top of your head and drag it down to cover your face rather than lifting them away from your face and then placing them into position. Eventually the foam gets pulled away from the mask.
but as above it is easy enough to stick down again.