Intel-owned Basis released its Peak fitness smartwatch in 2014, but the company halted sales back in June this year after reports of potential overheating issues. Now, Basis has issued a voluntary recall of the devices and urged all customers to stop using them, even if they haven’t experienced any problems.

“We are issuing this safety recall of the Basis Peak watch because the watch can overheat, which could result in burns or blisters on the skin surface,” said Intel senior VP Josh Walden. “It is important that you stop using your watch immediately and return it.”

Basis had been working on a software update that it hoped would solve the overheating issues, but it seems the plan didn’t work. “We had hoped to update the software on your watch to address the problem. Unfortunately, despite our best efforts, we aren’t able to develop such a solution without completely compromising the user experience.”

Basis said the watches caused injuries on 0.2 percent of customers, and it will now offer a full refund to anyone who bought a device and authorized accessories. “This was a tough decision, but your safety is our top priority.”

Intel has also ended support for the Peak; customers will have until December 31 to access their data from the watch. After this date, the Peak services will cease.

No deadline has been given for when owners should return their devices, but Intel urges them to do so “as soon as possible.” The company said refunds should be processed within ten days of receiving the watches/accessories.

Intel acquired the maker of the Peak smartwatch, San Francisco-based Basis Science, for a reported $100 million in 2014.

To find out how to return your device and receive a refund, go to this support site.