Once the device is out of the box, how you puff changes how it performs. In hot weather, the coil heats up faster. If you take rapid, long puffs back-to-back, you risk a burnt taste. That's because the wick can't re-saturate quickly enough. The fix is simple: slow down.

Take a puff, set the device down, let it rest for 20 or 30 seconds. Then go again. This is especially important if the vape has been sitting in a warm room—the e-liquid is already thinner, so it saturates the wick faster, but the coil still needs a moment to cool.

Another summer-specific tip: check the mouthpiece for condensation. Warm air meets cooler mouthpiece, and you get a little moisture. It's harmless, but it can mute the flavor. Just wipe it off with a tissue before you hand it to a friend.