ISDT Q6 : How to fix/clean failing scrolling wheel

I'm sharing with you my sucessfull experience trying to fix the scrolling wheel on my ISDT Q6.
Dust made it more and more buggy over time, so much that i decided to try to fix it.

Thanks for watching !!!
Feel free to ask any question in the comments section

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Link to items : ( NOTE : affialiated )
The Q6 Lite charger : https://www.banggood.com/ISDT-Q6-Lite-200W-8A-MINI-Pocket-Battery-Balance-Charger-for-2S-6S-Lipo-Battery-p-1212757.html?p=OI011813735602201709
Heat gun : https://www.banggood.com/DANIU-220V-300W-DIY-Electric-Heat-Shrink-Gun-Power-Tool-Hot-Air-Temperature-Gun-with-Supporting-Seat-Plastic-FIMO-p-1025199.html?p=OI011813735602201709
Additionnal on/of switch : https://www.banggood.com/OnOff-Switch-Connector-Plug-JST-Male-Female-Wire-For-RC-Li-po-Battery-p-77399.html?p=OI011813735602201709
XT-60 connectors : https://www.banggood.com/10-Pairs-Amass-XT60-Plug-Connector-With-Sheath-Housing-Male-Female-For-RC-Drone-p-1005955.html?p=OI011813735602201709

Видео ISDT Q6 : How to fix/clean failing scrolling wheel канала dudu du76