Can't beat dipping the tire in water to see bubbles leaking out. Ha, about the only thing most people have a home for this is their bathtub. But takes time because will have air stuck to the side of the tire, have to wait until those bubbles slow down.
Been planted here way before tubeless tires came into existence, to me, another way to save a couple of bucks, have about ten feet of tire rim space to develop leaks that was never a problem with inner tubes. Both the rims and tire has to be cleaned, and a sealer used.
Back then could break the bead with my foot, both sides, beads have to be pushed in, and just a small pry bar, could get the tire off. Still doing this on my bicycles, but no tools are used on these.
This problem really had been exacerbated by the extensive use of road salt, the government solution to this problem is to make TPMS mandatory on all vehicles. Kind of stupid, when you can tell by the handling you have a low tire. And an extremely expensive way to replace a cheap tire gauge. Just a tad more of convenience, but still can't find air anywhere with these convenience store selling beer by the tons gas stations.
Yet another problem with tires that share the same problem with simple oil changes, they don't use the brightest people in the world to do these tasks. Daughter-in-law recently went to her Walmart store to have a leak repaired. Put some minimum wage guy to do the job and ended up wrecking the tire. But her father-in-law straightened that out for her.
Another problem with mandatory ABS, all tires have to have equal wear, difference in rotation speed due to one new tire will generate a code. To do it right, and if you have to follow rotation rules imposed by tire manufacturers, have to replace all four.