I've had good luck with acetone+atf but I am surprised Kroil and PB Blaster didn't perform better as I have had lots of good experiences with both.

Regardless, the main problem with WD-40 is the popular misconception that it's a decent lubricant.

My favorite is CRC Knock'er Loose. Better than Kroil in my experience.

Idk about wd40 but acetone is pretty gnarly. Know what acetone does to your eyes if you get some splashed in them? The same thing it does to everything else.

I second heat. I always go for heat if possible first. Bonus is it is mess-free generally.

In my own experience, kroil was far, far, far better than WD-40.

Good luck even finding Liquid Wrench now.

Home Depot is such a wasteland. One shit brand of every product, and that's it. Row upon row of worthless, crumbly Dap wood filler, for example.

I went there and asked three employees, probably separated in age by a decade each, for household oil. It's as if they didn't even understand the words. We're talking about 20- to 40- or 50-year-old HD employees who don't know WTF 3-in-1 oil is. Incredible.

I strongly prefer going to my local ACE Hardware or True Value Hardware before Lowes or Home Depot. Their prices will tend to be a little bit higher. However they seem to be staffed by people who know what they are doing, and Home Depot and Lowes stopped doing that entirely. I can walk in, ask the old guy working there what he might recommend and he will give me a recommendation.

Yeah, same. But it can be tough for people with full-tine jobs to conform to mom-&-pop store hours.