crwdns2936637:0crwdne2936637:0 crwdns2853008:0crwdne2853008:0 crwdns2918746:0crwdne2918746:0

crwdns2933803:01crwdne2933803:0

crwdns2933797:0Eiticrwdnd2933797:0crwdne2933797:0

crwdns2936043:0crwdne2936043:0 crwdns2933505:0crwdne2933505:0 Eiti

crwdns2933769:0crwdne2933769:0
crwdns2933771:0crwdne2933771:0
crwdns2933801:0crwdne2933801:0

crwdns2933807:0crwdne2933807:0

[title] Remove dust/filth
-[* black] Roll the wheel and look for any dirt/filth that may have accumulated on the inner side of the wheel in the form of a little ball that interferes with the sensors. Carefully remove it using tweezers, so you don't bump the assembly out of alignment.
+[* black] With the cover open, look at the scroll wheel on the side that has a hollow central area and roll the wheel. You should look for any dirt/filth that may have accumulated on this inner side of the wheel in the form of a little ball that interferes with the sensors (see image on next step).