I'm not sure what had gotten on the sheet but it had to have been water soluble. Even though a trip thru the washing machine would have gotten rid of it the guy at the front desk decided to keep my $50 deposit claiming it for the damage to the sheet and pillowcase. The thread count was not high enough to be worth $50 for a top sheet and one pillow case.
And nothing I had could have made the marks on that sheet , I have no idea where it even came from, I didn't even use that side of the bed.
The place is rundown , broke down dismantled cars in the parking lot it's not worth the money I paid for the room .
You've been warned.