Most of us have mag brushes that we use. Drop the base plate/pad/whatever off and remove spring and follower, a few strokes with the brush, reassemble and you are back in business.
Failure to do so WILL cause problems sooner or later no matter what gun is used.
Having enough mags to not need to clean them is nice, but I darn sure can't afford it for each gun. I've got $100 EACH in my STI mags, 15-20 mags for one club match = OUCH
First link below is a mag brush, probably the most popular I see for double stack mags.
Second link is basepads for double stack mags that make disassembly, cleaning and re-assembly literally a 5 second job.
http://shootersconnection.com/store/...products_id=72
http://shootersconnection.com/store/...roducts_id=111