My Eheim canister priming support is not sucking water, hard to press down
and very sloooow to come back up. Have to actually pull back up on that
primer button.

I have a little packet of grease that was included in the box but just where
to grease is a mystery. I'm leery of using this grease also, must be a
petroleum product of some kind I presume?

Any info. would be appreciated from anyone experienced with Eheim canister
filters thanks, John