Ugh, been there! A dull blade makes everything fight you. For pork belly, I mark my lines with a sharpie and go slow, letting the saw do the work. If it's pulling or leaving a rough edge, that's the first sign to check the blade. I keep a spare blade on hand just for this reason.

Totally get that. Ever try to open a paint can with a flathead screwdriver? I used to hammer and pry until the lid was wrecked. Watched a guy just tap the tip around the rim a few times to break the seal, then lift it clean. Felt like an idiot.

Man, tell me about it. My watch once said I was at 185 bpm while I was just sitting on the couch eating chips. Nearly choked. I looked like a ghost checking my own neck pulse. @dakotal19 is right about keeping it tight and clean, that's the only thing that works. These things are great until they decide you're having a medical emergency during a commercial break. Makes you wonder about all the other data.

That fuzz is normal, but if it looks like glitter, you might have a real problem.

My 2019 Vevor 2L digital model corroded through the tank bottom in under a year using simple green. It was the sealed transducer type too. I've gone through three different cheap units, and every single one failed with any solvent stronger than water and dish soap. For small, greasy parts like shutter blades, I found the manual pre-clean with a brush matters way more than the ultrasonic cycle.