Isopropyl isn't meant to be ingested or vaped. If you do use it, you'd have to make sure that all of it has dried away, especially within the wicks.
Hot water would be a better choice.
I use 151 proof PGA. 190 proof isn't legal in my state. Standard Vodka would do too, which also doubles as ... Vodka
Some people have reported success with denture cleaner, and it's pretty cheap.
Gotcha. I'll try water first.