I've never had this happen before but one of these is the culprit in this recipe that is jamming up my syringes, all are Tfa/Tpa flavors.
Cola Syrup (TPA)
Ethyl Maltol 10% (TPA)
French Vanilla (TPA)
Menthol (TPA)
Cola Syrup (TPA)
Ethyl Maltol 10% (TPA)
French Vanilla (TPA)
Menthol (TPA)