United flight 1216. 9/17/15. Las Vegas to Houston. Something's leaking, they're going to check engine #2. I'm grateful for that attention to safety. But another problem, speaking of #2, is that we've only been stranded on the Tarmac for an hour, and the restrooms already smell dirtier than a Scout camp pit toilet in the middle of July. For the love of all that is civilized, can United Airlines please use some sort of cleaning products - that contain actual CLEANSER- in there? I've never wished more in my life for severe nasal congestion.