I read a really good article 20 yrs or so ago that argued that many .22 lr rifles are overcleaned, and cleaned in such a manner as to damage the bore and or crown.
Since then, I clean the bore of my .22's sparingly, no burshes, and only with patches and solvent when I use a rod at all. My current drill is a bore snake that has lost most all its bristles. I put solvent on it and pull it through a time or two after a shooting session. I do not leave one dirty, as the heat and humidty here can cause trouble quick.
I am particular about chamber, bolt face, breech face and metal exterior, but do not get carried away on the bore,