How does everyone remove protein from Dream Lenses?

It has been a few months since I fitted Dream Lenses for my elementary school-aged child's eyesight, but taking them out and cleaning them every morning is the absolute worst part. ㅠㅠ Even though I apply the special solution and scrub them thoroughly, I feel like the protein residue isn't being completely removed.

Because the lenses are worn with some protein residue still on, my child has been crying and making a huge fuss every morning when I try to take them out, saying their eyes hurt so much. Trying to force them out with a suction cup makes my hands tremble, so every morning is a battle. I'm also nervous about scratching the lenses when I try to rub them by hand.

These are expensive lenses I got for my child's eye health, but managing them is so difficult that I'm thinking about getting help from an ultrasonic cleaning machine. I've seen a lot of people on mom forums using self-cleaning machines lately; is it definitely more effective at removing protein than hand washing? If anyone says that using one cleans the lenses thoroughly without residue and improves comfort when removing them, please give me some advice! Haha.