Dirty boys / Chemical question

[Cockney_si]

Someone keeps peeing into one of the bins nearby at work, no one knows who it is.

Anyone good with science out there and know of a powder or chemical that is harmless but when mixed with urine produces a puff of smoke / coloured smoke / noise or something else.

just want shock value, no casualties although would be amusing to know what would happen.

Cheers in advance !

[mrs_overall]

The dirty pig!
If the bin has a lid, I'd suggest using a large rat trap.

[jackthehat]

Empty several packets of 'Space Dust' into the bin............the crackling and popping when he pees into the bin will soon idenify the culprit.........:o)

[R1Geezer]

cover the bin with cling film under lid. Pi55 and a shower at the same time!

[PatriciaH]

Lol @ geezer ! make sure the cling film is really taught ... hope it sprays back at them

[Cockney_si]

I love that idea Jack !