It's making my basement smell good, and it's just stuck to the front grill
uhhhhh i'm getting queasy...
the wifey uses these items - the box specifically states to use on low heat setting only, and not to use with children's clothes because it may reduce flame resistance. the box also talks about a "oily stain" that can appear on clothes....
i don't know whats in those sheets - but i doubt it's ultimately safe or good for youir machine.
who cares about a little lint inside your computer? i've been using mini-computers and pc's for over thirty years, and have never had a performance issue or hardware failure related to "lint"
if it worries you so much - open the case up and vacumn or blow the lint out once a year - better yet - just don't look at it.
reducing the airflow through your case is probably more harmful to your components than any amount of lint.