Quality control is a problem
I've ordered twice from this site, ordering 5 cartridges at a time. Each order has had 1 defective cart, the wick isn't attached, inside the cart. If someone had just looked at these cartridges before they were shipped out, they would have seen that 1 cart from each order was defective. My remaining cartridges are ok, but they really made the oil taste bad, due to them being plastic, but they work in an emergency.