If wiggling the cord around has any effect on them, then a bad connection seems fairly obvious; you just need to work through a process of elimination to narrow down where the problem is.

Try plugging the lights into the socket normally used for the MW, and see whether that makes a difference. Plug some other light fixture into the socket ordinarily used for the UC lights, and see if you can reproduce the problem. These simple tests should help you see whether the problem is with the socket or the lights.

Don't imagine that the socket is fine because a MW is plugged into the other side of it; if the lights are on a switch and the MW is not, then the two halves of the outlet have been disconnected from each other and will behave independently.

brooklynnina - Sorry to not be able to offer any suggestion to your original question, but was hoping you might respond to my question.

My husband recently installed similar lights under our upper kitchen cabinets. We really like them, but I've noticed that the shelves inside the cabinet are warm (not hot however) to the touch after the lights have been on for awhile. Just curious if you notice the same with yours.

Thank you.

I have the same problem with what i think is an Ikea set that I inherited when I bought my house three weeks ago. Personally i think the issue may be the item itself. Mine are hard wired into the electric box and operated with a switch. I plan to do one of two things: move my coffee maker in case evaporation and moisture are having an effect, Or purchase a new set. I know that halogens can get a hot spot if you do not use a Kleenex to hold the bulbs when changing them. Maybe there is an issue with the box regulating the power that goes to them. If I figure it out I will post again, but if your items are under warranty from Ikea I would return them....p