I've been DIYing since I started using. Started with 100%VG, found it gave me terrible runny nose, and quickly coated inside of my auto windshield with an oily film. Less drip, longer to coat windshield at 50/50 PG/VG. Finally landed on 70/30 to 75/25. Still slight runny nose, a couple weeks to coat windshield. Stop vaping, nose drip stops. Start vaping, nose drip starts. JMHO
Cheers,
otrpu