The other day my faithful Canon A80 stopped working.  After turning on the power the lens would extend then retract, and the display read ‘E18’ and then the camera shut down. Apparently this is not uncommon and related to grit,grime or miscellaneous sticky stuff gumming up the zoom lens, causing it to misalign as it extends.  This camera has been through a lot, to the beach, up mountains, taken on ski trips and boats, from Bintan to Baku.  So it most probably IS full of crap.  Rather than taking it to the shop for an expensive cleaning and overhaul, I followed advice I found online, laid the camera facing up, and firmly pushed the lens around to try and dislodge whatever goo was in the mechanism.  Now it works.  Let’s hear it for giving things a kick.