Every gym I've ever gone to has featured a never-ending battle between those who shirk their post-set machine cleaning duties, and those who detest the sweaty stink left after the prior user slinks away without dutifully using the sterilizing spray and paper towels to appropriately sanitize the area.

Short of video evidence and instant membership bans, this battle will never be won. There will always be people taking a quick look around and then shuffling over to defile another machine.

Given that it's as probable as not that any random machine has the leftover pore secretions of the prior user, and it's unlikely to change, why not just accept defeat? Decree it the standard that all users should clean the machine before they use it. Levy no post-use demands.

Not only does this allow for the reality that many people have little concern for the next guy, the cleaning job will likely be vastly superior if people are cleaning for their own use. Those who really don't care can enjoy their collection of skin growths, and those who are really paranoid can appropriately equip themselves with high-proof anti-microbial, and some good defensive clothing/towels.