stop the bleedage!
i use the same setup as you. i have a clamp on my snare for micing. if u want to completely ELIMINATE any bleedage from ur hihat, try and find a unidirectional mic. if u only have an omnidirectional, try and point it as far downwards as you can. raise your hihats the highest u can BEFORE the point where theyre too uncomfortable.
if ur still getting bleedage and u cant find an omnidirectional, there are some other things u can do. (it depends on what exactly the problem that the bleedage is causing you.) if your problem is that ur hats are too loud because theyre bleeding into other mics amplifying the volume level that your actual hihat mic is at, then just turn down the volume level of your actual hihat mic. that way you will be balancing it out, because the hats are getting volume from other mics anyways.
personally i dont mind if every piece of my set is bleeding into one another (sometimes) because it gives the set a more full sound and makes it sound like all one instrument. having each piece perfectly seperated from one another gives it more of a dead or focused sound (if thats what you want but....) it sounds not as together and more like each piece is a different instrument or track.
so to sum it up, raise ur hats as high as u can b4 theyre too uncomfortable to play, point ur snare mic as far downwards as u can (sometimes using a stand is better, seeing as the clamp has less positioning optoins), or try to find a unidierctional mic on ur snare or whatever pieces u want perfeclty seperated. (perfect seperation IS nearly impossible, but u can try).
Good luck!
Jay, The master of home recording.