Some smart tv owners have reported that their devices slow down over time, but the cause may not be due to the hardware. Several possible explanations and solutions have been proposed, including issues with certain types of devices, such as the Fire TV Stick, and suggestions for easy ways to improve speed. The exact reason for the slowdown and the most effective fix are not universally agreed upon, with some attributing it to software or connectivity issues, such as the need for a specific cable.