What could be causing coils burning out quickly?

[Lisa Bolton]

Hi @Lisa Bolton,
I do the same to increase the PG proportion in 70VG/30PG shortfills. I buy 100% PG Nic Shots from Darksar, see link:
https://darkstar.co.uk/products/18mg-ml-pharma-grade-nicotine-shot-2?variant=38197138489518
Make sure the 100% PG is selected at the top right of the page.

Darkstar has been a reliable supplier of quality Nic shots for many years and they have good prices. I buy the shots in packs of 20, so a 10ml shot costs £0.75,

Thank you. Yes I've ordered some. Unsure if same brand though but I'll check