leaky pipe under kitchen sink driving me nuts

Good call on checking the fittings - seen that happen more times than you'd think. Another sneaky spot is the threads themselves; sometimes they're just worn or slightly stripped. Might wanna peek at those too before you buy replacements...could save you another headache.

Had a similar issue last year - turned out the threads were fine, but the pipe itself had a tiny hairline crack. Took forever to spot it. You checked the pipe closely for any small cracks or corrosion yet?

"Had a similar issue last year - turned out the threads were fine, but the pipe itself had a tiny hairline crack. Took forever to spot it."

Yeah, those hairline cracks can be sneaky. Had something similar happen under my bathroom sink a while back. I spent ages tightening fittings and replacing washers, convinced it was the threads or seals. Turned out there was a tiny crack hidden behind the pipe bend - only visible when water pressure built up. Have you tried drying everything off completely and then running water slowly while checking closely with a flashlight? Might help pinpoint the exact spot...

Had a similar experience a few months back - thought I was losing my mind chasing drips under the kitchen sink. Turned out it wasn't even the pipe itself, but the joint between the pipe and the disposal unit. Only leaked when the dishwasher drained, so it was tricky to catch. Have you checked if it's worse when certain appliances run, like your dishwasher or garbage disposal? Could narrow things down a bit...

Had something similar happen - spent ages convinced it was the disposal itself, only to find out the dishwasher drain hose was loose. Check all connections carefully while running each appliance separately... plumbing gremlins love hiding in plain sight.