Is it possible to clean a medusa motor?

[Finnster]

How do you have a piece of piss?

I can see where you can have a piece of crap, considering its a solid form, and removing a chunk of it would create a distinct and uniquely distinguishable piece of the parent material.
Bit of a logistical problem in piss piece portioning perhaps? An aliquot of piss, a portion of piss, even a fraction of piss... those I can see. But to call it a piece of piss implies a level of uniqueness and unrecreatability of shape I don't think you can achieve with liquid forms due to their miscible nature.

Either way, I wouldn't use it to clean the motor no matter how clean your can is.