Is the hard contact lens cleaner really useful?

I used to wear soft lenses, but my dry eye condition got so severe that I switched to hard lenses. The dryness is definitely less, but managing them is a real chore. Every evening, I rub them with a dedicated cleaner on my palm, but since the lenses are hard, I'm not sure if I'm cleaning them properly.

I wonder if protein residue isn't being wiped away, because my vision gets blurry by the afternoon. But I'm too worried about scratching my expensive lenses if I scrub them hard, so my hands tremble every time I clean them, which is really stressful. If they get scratched, the lenses' lifespan is over, you know.

I looked it up and saw that a lot of people use ultrasonic hard lens cleaners these days without touching them. Are they really effective? I'm curious if using a machine eliminates the worry of scratches and removes protein better than hand washing. Since it touches my eyes directly, I'm thinking of getting help from the machine. If you've used a hard lens cleaner and found your eyes more comfortable, please give me some advice!