Don't be shy. A good vape shop clerk should be able to answer these without hesitation. If they can't, that's a signal.

• "How did you determine the puff count? Is it lab-tested or just an estimate?"
• "What's the e-liquid capacity and battery size on this device?"
• "Does the puff count change if I use higher wattage or longer draws?"
• "How long has this device been on your shelf? Older stock might have a weaker battery."
• "Are there any Illinois-specific labeling requirements I should know about?" (Spoiler: there aren't, but a good retailer will tell you that.)

In Illinois, you can also check if the store is licensed to sell tobacco and vape products. That's a basic trust signal. If they're not, walk away.