Cleaning my M&P 22 & other pistols
I may be accused of over-cleaning, but I had an antique gun rust beyond repair once, so I'm a little over-cautious...I do this every time I shoot my pistols regardless of the number of rounds I put through it...
I also own the M&P 9mm. I first run a patch with a small amount of Hoppe's 9 solvent through the barrel once. Then run my brass bristle brush through it at least twice. Next I run a clean patch or two through the barrel until it comes out pretty clean. I followup with another patch that I've put a few drops of the Hoppe's gun oil on which leaves a very thin film of oil.
For the other parts of the gun, I first use a patch with a small amount of Hoppe's 9 solvent and wipe out the gunpowder residue from around the slide, hammer, and clip area. I use a clean soft cloth to dry the solvent from these areas. Then on another patch, I apply a couple drops of oil and wipe these areas with a thin film of oil. I put a droplet of oil on each of the parts that come into contact with the slide notches and reassemble the gun and rack the slide several times to distribute the oil along the slide rail making sure it's functioning properly.
Finally, I use a soft cloth to wipe off fingerprints and excess oil from the entire exterior of the gun, handle and metal parts. Hope this helps.