Yep you can't just leave it there for extended periods for reasons already mentioned.
I just spray some Pam on mine, do the check, after a week or so, remove and clean them up a bit and reverse them keeping the greasy side facing down until I want to check again.
Works for me. Debris is normal. There can be a lot sometimes, like when wax building or an exceptional flow is on.
Note; Randy Oliver is amazing! I love his stuff