Aha, knee pain, the bane of many a cyclist's existence! You're on the right track with seat height adjustments. Too high, and you're putting undue stress on those kneecaps; too low, and you're asking for some serious hamstring hassle.
But don't stop there, my friend! Check your saddle's fore/aft position too. If it's not in the right place, you might as well be pedaling in circles. Oh, wait...
And while we're at it, let's not forget about your cleat alignment. If those bad boys aren't aligned properly, you're asking for a world of hurt.
So, yeah, knee pain can definitely put a damper on your cycling spirit. But fear not! With a bit of tinkering and tweaking, you'll have that pedaling perfection in no time. Just remember, there's no shame in seeking professional help if need be. After all, even the greats need a little assistance sometimes.