So I did my first VG mix today of 1/5 a 30mL battle of 18mg apple PG and filled the remaining with VG (Glycerin from CVS) and added around 10-15 drops of vanilla extract. It tastes pretty good but Im find that Im adding more drops after like every 10 or so puffs because I run into the burnt taste fast on my 510. The vapor production is huge but its getting annoying to have to use so much!