[QUOTE=gululok;22227405
Btw, is there any trick to pulling out the dust cover? I spent a long time prying with various screwdrivers, and ended up putting in a screw to gain purchase, but that left a hole that I'd have to caulk over.[/QUOTE]
Use the shortest screw you have to fill the hole. Then, in the future when you want to lube the pedals, remove the screw and use a grease gun
with a blunt 'needle' fitting to inject grease into the hole til it extrudes from the other end of the pedal, replace screw and you are done.
This was Speedplay's standard approach to lubing their pedals and it works well. One indication for relube is a pedal that spins freely.
Lubed pedal will just spin a turn or so.