Start with a fresh head. If your device has been sitting for a while, give it a few minutes to let the e-liquid settle. Then check the basics:

• Airflow: Make sure the little holes on the side or bottom aren’t covered by your fingers or pocket lint.
• Mouthpiece: Look for any gunk or debris blocking the opening.
• Charge: If your device is low on battery, some models will produce a weaker, harsher hit. Plug it in if it’s rechargeable.

Take a test puff—slow and gentle. If it tastes fine, great. If it’s still burnt, move on to the next step.