Every time, after firing one round or 500, I pull the barrel and spray the magazine tube, piston, piston seal, and the inside of the barrel gas ring with RemOil - used WD-40 for probably 20 to 25 years - and wipe off the excess. I don't get it "dry", just not really wet when I am done. Breakfree or 3-in-1 oil or anything will usually suffice in a pinch. I do this before I put the gun away. Next time, grab and go. If it gets wet, I pull everything down and dry and lightly lube. An old toothbrush is ideal for cleaning out the inside of the receiver. If you use a finger, it will cut you. I always wipe down the outside to get the oils from your hands off too. The whole thing takes less than 5 minutes when you get used to it. Be careful taking the 'O' ring on and off over the threads. That is what can get them, ham handedness. They don't move in service. On 12 1100s and 11-87s over 50 years I have never lost an 'O' ring in use, so when you hear about them, keep that in mind.
An 1100 will not go as long between cleanings as some of the newer designs, but in 50 years I have yet to run across anything more reliable if you clean it after shooting it. And I have had over 40 shotguns. Mine took me from the standing joke to skeet league high average (junior) all those years ago, and one went to Manitoba with me 3 years ago. That '63 is still my go to 12 gauge clays gun. Enjoy.