Coolant ws-23 is most popular in e-liquid because of its solubility and durability, and it does not affect the flavour of the e-liquid, but just enhances the cooling taste.
Usage is as follows:
The solubility of ws-23 in PG is 30%, then the percentage of 30% coolant added to the e-liquid is 2-3%.
Many customers also like to mix cooling ws-23 with ws-3 for an amazing cooling sensation.
The solubility of ws-3 in PG is 10%, then the percentage of 10% coolant added to the e-liquid is 0.5%.
You can adjust the addition percentage according to the desired effect.