We laugh about the similarities of our hips to cars, but have you ever looked at a CV joint and the boot that covers it,...well it's not a ball and socket, but it operates like one and it's covered with a capsule and it needs lube. Told you guys long ago I could have been a surgeon, it's just like working on a car, right?
Seriously, I notice a little bit more clunking when I haven't been doing daily exercise, like riding the bike. I'm with Chuck on this, the hydration thing is important, but then it's important for the rest of your body, so you should be drinking that much water anyway.
Also, for maintenance, I'd say tuning up you muscles around the hip several weeks before taking on a sprinting sport. Do the theraband PT exercises we did during recovery. I don't have to do that all the time, but I think it will help keep me from blowing out the soft tissue when sprinting in soccer, which I did one season and I wasn't strengthening the muscles around the hip beforehand.
Otherwise, drink lots of beer to keep the hip lubed