If you do the dry burn and the device smells like burning plastic even after a few cycles, or if it doesn't turn on after a full charge, that's not a break-in issue. That's a defect. Contact the manufacturer or the store you bought it from. Don't try to fix it yourself.

Also, never charge a device that has been exposed to liquid or has a damaged battery. If the device feels hot to the touch while charging, unplug it and stop using it. That's a safety issue, not a break-in thing.