Using a Phillips screwdriver on JIS screws will cause premature wear on the drive cups and eventually strip them.

The number of rubber strip. The other, when the wiper wiper is not complete, can also purchase a wiper blade corrector, friction rubber parts and rain wiper blade, the irregular wear part corrected.

But the peak of contact pressure between rolls forms when the intermediate roll shifts, which leads local wear of rolls and quality defects of strip.