I'd say it's more rude to touch someone else's screen than to ask someone not to touch your screen. Go ahead and tell them not to dirty up your screen. The sit

I'd say it's more rude to touch someone else's screen than to ask someone not to touch your screen. Go ahead and tell them not to dirty up your screen. The situation with the company laptop is a little more complicated because the property is, in some ways, as much theirs as it is yours. Still, you're using the equipment so you have a right to keep it smudge-free, whether by wiping off the mark or by asking them not to do that. Hopefully they'd take the hint if they saw you wiping away the smudge.