First off stock fk mouse feet are pretty shit so that's no surprise. Second off, how often do you clean your mousepad? The teflon on the mouse feet can wear off and get stuck into the pad, usually produces kind of a "sticky" feeling which can be attributed to more friction. I've had pretty good experiences with hyperglides in the past and a month is way way on the short side of their lifespan, especially on a cloth pad.
Of course there's always a chance your qck is just wearing out, I've never had amazing durability with that pad.