Stupidest Thing You've Done in DIY?

[sed]

I didn’t look at other mixer’s notes and single flavor tested Flavorah Cool Menthol at 10%. It was like inhaling Vic’s VapoRub. After I rinsed out the bottle, menthol crystals started forming on the walls as it dried.

[Gus6]

Believe that I will find the “ultimate recipe”
Hahahahahaha…