Kitchen Nightmares, Season 3

Gordon:
(to Nylah) Having a dirty refrigeration unit is one thing. Having a filthy bathroom is something that (bleep) scares the hell out of me.

[They went to the bathroom.]

Gordon:
This thing here [the blue UV light] detects body fluids. Just have a look at this.

Nylah:
That's body fluids up there?

Gordon:
That there has got nothing to do with any form of cleaning. Look at the (bleep) state of this. Green, green, green, green, green. And here's where it gets really scarry.

[The UV light is shown towards the ceiling.]

Nylah:
How the hell did it get up there? (interview) It looked like somebody may have peed on the ceiling, the walls, the doors, you know. It could be a throw-up. I can't even imagine, you know. And it made me sick, I didn't even want to touch the door-knob coming out myself.