Originally posted by 98CoupeV6
But really, there are warnings on the cap that tell you to not take off when hot 
Yeah, take it off while hot and it really sprays. I was around when my mechanic uncle had to unscrew one, and I was glad I wasn't doing it, even tho he did have a cloth. And I add my coolant to the reservoir while it's cool, since it has two reference markings.