A once a year cleaning(at least, and dependent upon which powder youuse as well as how much blowback gets into the frame)...

Remove the ramrod, remove the forearm, remove the hinge pin, separate the barrel from frame. Thoroughly clean the barrel and breech plug - inside and out to include the removable extractor and its channel. Clean the ramrod. Clean and lube the forearm screws and hinge pin. Wipe down the interior and exterior of the forearm - a lightly oiled rag should work well for that. Lube the sling studs.

Remove the pistol grip cap. Loosen the frame retainer bolt - remove frame from butt stock. Clean and lube retainer bolt as well as grip cap screws. Wipe down all surfaces of the butt stock that can be reached (use that lightly oil rag).

Remove the firing pin assembly being careful not to lose the pin or its spring. Thoroughly clean assembly and the frame cavity for same. Make sure pinis smooth as well as the holefrom which it protrudes - noroughness. Apply a light grease to assembly exterior. Set aside for re-assembly.

Here's where I'll raise some eyebrows. I take the frame to the sink and flush with (hottest available) water thoroughly while using a toothbrush to scrub out residue. The I take the frame to the compressor and blow out all undried water. I then give the frame a liberal shot of WD-40 and let is sit such that excess can drain out. Leave it sit for 30 minutes then turn it and let drain more. After you're reasonably sure all excess WD has drained, take it to the compressor and blow it out again. At this point, wipe out any remaining WD with a clean rag (as best possible). Give the frame a good blast with carb cleaner and again go through the draining process followed by the blow down. Wipe the surfaces down with a rag, this time a rag containing your chosen protectorant (RemOil, Breakfree CLP, Eezox, Sheath, etc). Add a few drops of same to critical parts of the frame then again wipe down excess.

Re-assemble rifle, leave plug out of barrel. Store rifle muzzle down for about three days. Again wipe down any excess lube and swab the bore, first dry then with protectorant.

That's how I completely clean an Encore or G2 (and with variations, all my rifles).It is work but it's worth it. My rifles remain spotless, rust free, and accurate.

I would recommend you clean the firing pin assembly after any serious range session or significant amount of shooting.