Check this.
Just saying.
https://youtu.be/QHDsuAcyQFc
Unfortunately Hman, it happens reading a paper, looking at my phone etc. A change of w/c'ing tool ain't gonna help.
Yes that what I thought too.
After using my DIY squeegee handle for over 7 years with the square quick lock on it.
Only realized that if put this square piece on the end of any squeegee handle .
That it also made it easier to grip like the DIY self one.
With this never had problems.
And yes have had all symptoms numb fingers, cramping wrist, forearms and also have arthritis in hands as well.
As said before just try it .
You will never know other wise.