Car Guy Question: Wiper fluid smell leaching into cabin

use plain water instead of fluid like the rest of us (duh)

Route a brand new washer fluid line to come under the dashboard next to steering wheel. Fill reservoir with bourbon.

See if you can switch off the fresh air and leave the system off or at least set it to recirculate.
I seem to recall that some GM products always let air in from the bottom of the windshield, though.

All this

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One of your hoses between your washer fluid pump and the spray nozzles is broken. They are easy to trace , troubleshoot and repair. AutoZone has the hose. And any replacement fittings. Usually the only tools necessary is a pair of needle nose pliers and a sharp razor knife.

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Had this happen this past summer. Had to replace nozzle too. Don’t get cheap tubing. It won’t fit right.

The windshield wiper fluid reservoir has a leak.

Down the firewall, underneath the carpet, into the cabin.

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Wiper fluid smell leaching into cabin

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Let me guess….you are using that Rain-X brand washer fluid….

Are you sure you are smelling your washer fluid and not your blinker fluid?

Make sure it's washer fluid and that something like methyl hydrate is not mixed in the solution, which will increase the smell on a warm windshield. Also, the Lucerne has a washer fluid heater that should be disconnected as per a Buick recall statement. Check that the fluid is draining from the cowl vent because the cabin air filter port is on the passenger side.