I've been buying boges since I got my provari(about 6 months ago). I buy in bulk- 2 boxs of 10 -packs. I like to vape at 5V using MsTs E-juice. I have had to buy from different vendors because my main shop (goodprophets) barely ever has them in stock. So theirs was good, maybe 1 bad one a pack, now I have the same exact standard black 3 ohm boge cartomizers. Now these ones are really.. Ticking me off. After filling up the carto's with around 30-35 drops, maybe 1-2 out of every 5 pack starts to burn after maybe 20 pulls. Is their a certain way to store them? Keeping them cold-warm or anything? I know it's not the juice bc the same juice was doing fine on my last batch of carto's. Its getting very frustrating, Any tips would be appreciated, bc 1 or 2 out of five is rediculous. Oh and I checked the ohms also, so I'm stumped- thanks