My snakes like to go on you every now and then, I found if I wait 3 days after feeding I usually don't have that issue

And I also went to my local thrift store and bought a couple blankets, sheets ect, I use those when I holding the snakes or letting them move around

If they get soiled I either wash them or hose them off or just toss them when they get gross and get a couple more.

I found after they get a year or so old, I rarely have that issue anymore.