Final answer:
To make LED lights sticky again, clean the surface with alcohol and use new double-sided adhesive tape or opt for securing the lights with mounting clips for a more durable solution.
Step-by-step explanation:
If the adhesive on your LED lights is no longer sticky and they are falling off, it's a simple issue to address. You can try cleaning the surface where the LED strip will attach with alcohol to remove any oils or dirt that might prevent sticking. If this doesn't work, applying double-sided adhesive tape is a common solution. Make sure to get a tape that is strong enough to hold the lights in place, but be aware that some tapes may damage the surface upon removal. Another option is to use mounting clips, which provide a more secure and lasting hold than adhesive tape.