oil temps no problem, i know that my engine doesn't have a pressuresing problem so i'm not really expecting to get much more than a few drops worth in it.the last "can" (read coke bottle) i had in for well over twelve months and had next to nothing in it when i pulled it out.
it's quick to get out, just have to back off the hose clamps and it'll slip off the bracket i made to mount it on.
also looked at the stainless steel wool idea, but figured it a bit of overkill as i'm not plumbing it back into the engine. the breather enters not quite at the bottom of the can it sits up a bit, and its sitting below the crank breather outlet as well ....