The answer to 'smoke detector hot to touch' is that a smoke detector that is hot to the touch is usually a sign of an electrical issue or potential fire hazard. This could be caused by a malfunctioning component, a wiring problem, or the detector being too close to a heat source. It's important to address this issue promptly to prevent further damage or a potential fire.
If your smoke detector is hot, first try to locate the source of the heat. Check for any nearby heat sources that may be causing the detector to overheat. If there are no obvious external heat sources, the issue is likely internal. In this case, you should turn off power to the detector, either by disconnecting it from the electrical system or removing the battery, and contact a professional electrician to inspect and repair the issue.