Ants seem to be coming into bathroom from back of light fixture which is 10 feet from an exterior wall. How do I get rid of them?

You can possibly find their nest outside, if they are ground nesting ants, if they are not nesting under the house, and if they are not nesting in your gutters.

You can hire an exterminator to identify them and find their nest and eliminate them.

You can try to take care of them yourself. Liquid baits will probably work best on them, as water would be the most likely reason they're going to a bathroom. Do not get the "extra strength" baits, you want them to take some back to the nest to feed the next generation. If they take the bait, it can take up to three weeks to eliminate the nest.

Thanks for the info. I'll put it to use.

Thanks for the info. I'll put it to use.

Good luck. You will need it. One last thing... liquid baits come in different flavors. The Honeydew flavored ones seem to do best. Those are the clear ones with a slight tint of green. The yellowish ones are more sugar flavored.