Refillable vape tanks can be used for years if you take proper care of them. Vapes require regular cleanings, and that includes the tank. You need to remove all the excess vape juice each time, so a foul-tasting buildup of old juice isn’t left behind. Mold also could develop in tanks that aren’t properly cleaned. Soak the vape tank in propylene glycol or warm water for a few hours every few weeks when you do a deep clean or when you’re switching to a new flavor. You should also be careful not to drop or otherwise damage the tank. Tanks with even with the smallest crack shouldn’t be used, as leaks into the vape can cause serious damage that requires replacing your entire setup. However, if you do these few things, you should be able to use your vape tanks indefinitely.