[66Notchback]

I have a jet on my truck that is, well, not spraying wiper fluid properly. I suspect road salt and such has fouled it.

I was going to run some isopropyl alcohol through the wiper system, in an effort to clean that jet, but the Missus is on my case about alcohol hardening plastics and tubes and such and doing more harm than good.

Can someone give me some insight, please.

[MyMotor]

I agree with her. I wouldn't use it anywhere that there could be rubber seals. I'd fill up the washer bottle with washer fluid and add some dish washing liquid. Enough that it foams a little-it helps when there is a build up of grease not only on the screen but in the jets. This is especially helpful at cicada time! Blast it through, and if it still doesn't work, use a slim pin or needle, some may disagree with this but I've cleared many a jet that way.