Dude wipe down your machine

Why is it that some people don't wipe down their machine at the gym after using it?

Do they not know?

People watch me do it.

I wipe down the machine before and after. There were 4 other people there and no one wiped shit down. This is a consistent problem at my building's gym. (Both men and women of all ages)

I don't know about everyone else, but I sweat and spit on my machines. It gets pretty gross. I also wipe down matts and bicycle seats.

Are people ignorant? Lazy? Or have an allergy?

I need to start saying

"Dude wipe down your machine!"