My favorite is Liquid ReNuit from CCI. For me, having cut my teeth on some pretty harsh and nasty pastes, this stuff offers the best balance of effectiveness minimal noticeable (if any) wear and tear on the screen mesh. You can't leave it on forever, but in prescribed dosage, it seems to do fine.
Not so the case with their LHR+Plus that I have a few bottle of via a promotion. If it dwells a little too long, the screens can be toast! I am experimenting with dilution (and always use a timer with settings at the low end like 3 minutes)