Drinking bandaids (elastoplast)

[manticle]

Diacetyl doesn't taste much like bandaids in my experience. Quite, quite different.

 

[SimoB]

Nothing like it.

 

[Blind Dog]

Yep more butter popcorn than band aids

With all the replies, and testing I've done, I think I'm down to infection as the cause. I've cleaned the crap out of everything and replaced the cheaper bits. Here's hoping

 

[adamsmith3d]

Ah apologies!
Well whatever that taste is, it definitely went away after 4-6 weeks in the bottle.