Why are heaps of dead ants turning up in her bathroom?

From the Mercury News
January 18, 2018

DEAR JOAN: I have ants in my bathroom. My husband says they are looking for water, and I agree with him, however, when I find them, they aren’t there after I’ve showered.

I first noticed them in my bathroom about two months ago. I sprayed and didn’t see them for weeks and then I noticed about a dozen dead ants in one corner of my shower. I hadn’t sprayed in weeks.

Now, every three or four days, there is about a dozen dead ants. The other night I lifted the bath mat that is in front of the shower and found a small cluster of dead ants there, as well as the dozen or so in the corner of my shower.

I’m not a big fan of ants, but I’m starting to feel kind of bad for them. Any idea what could be causing this?

Pauline O’Connell, Bay Area

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