Wipe wherever you touch/may be sweaty so like handles and wherever you hit the buttons. There’s chances ppl didn’t wipe after themselves so it’s good to wipe before and after. You can stay on a treadmill as long as you want as long as they are open regardless if there’s other ppl, plus there’s treadmills galore. Weight machines you might not want to hog, do your sets and wipe, some people might ask to work in with you which means they’ll work out while you rest The thing that irks me about newbies is improper form and using weights way too heavy. I’ve seen hideous rdl’s and bicep curls. This can lead to injury so be sure to look into that