I bought this hairdryer about 5 weeks in the past, and because then I've only used it a handful of situations. Every week back, it built a spark while I had been using it, and since then it hasn't heated up in the least when I turned it again on https://allhealthmarket.com/product/health-and-beauty-2/hair-care/hair-care-styling/hair-styling-devices/hair-dryer/portable-hair-dryer/portable-hair-dryer-2600mah-cordless-anion-blow-dryer-40-500w-usb-rechargeable-powerful-2-gears-for-household-travel-salon/