Lint isn't likely to affect function or reliability. If you're really concerned about lint and dust, you can open it up and use a can of "Dust Remover Spray" (from electronics shops, Radio Shack, etc.) to blow out the crap.
Otherwise, I think you should clean it once in a great while -- or, if you really think it necessary -- after you've fired it. If you have high humidity where you live, checking for rust is a good thing. A "Bore Snake" may be your best friend, along with a little CLP.
Ammo, nowadays, is non-corrosive, and a number of folks on this and other forums have run thousands of rounds through a single gun for extended periods before cleaning, and did so without noticeable wear or loss of function. I did that once with my CZ 85 Combat. It wasn't my only gun, and I just wanted to see what would happen. In most cases, the folks who do this sort of thing end up cleaning the weapon because the guns look so nasty they are grossed out and can't stand looking at them -- not because they aren't working properly. That's what happened with mine somewhere (I think) around 4000 rounds over a period of about 6 months. That happened in the late 1990's and I honestly don't remember how many rounds I ran through it, but it was MULTIPLE THOUSANDS, not hundreds.
Do what you want... but you're probably going to be wasting time and money unless you've actually fired the weapon or humidity is an issue.