foggy mask!!! Why? Help

[beeger]

Also, here's a tip: If she is storing her mask inside the plastic box that the mask came in when purchased, scrub that out also with the aforementioned toothpaste. I can't explain it in practical terms, other than to say in some cases there is still a fair amount of silicone residue on the inside of these boxes which, somehow or other, leeches back onto the mask and lens when the mask is stored inside the box. As for defog, I like the 500psi brand.