Canon EF-S 55-250mm f/4-5.6 IS - how to clean the lens inside

This video is about cleaning the inside of the Canon EF-S 55-250mm f/4-5.6 IS lens. The lens had dust behind the front lens element, so in this video the front lens element was removed, the inside of the lens was cleaned, then it was assembled.

UPDATES: n/a

TIMESTAMPS:
00:00 Intro
00:29 Tools
00:55 Like, sub, donate
01:26 Disassembly
04:08 Clean
07:00 Assembly
11:27 Outro

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TOOLS I USED (ebay /// aliexpress link):
PH000 screwdriver: http://ebay.us/Dz8nTA /// https://ali.ski/2e8ZaZ
Metal tweezers: http://ebay.us/jGp7JO /// https://ali.ski/g4VpW
Adjustable metal tweezers: http://ebay.us/yc3cbb /// https://ali.ski/k_elg
Suction cup: http://ebay.us/LDxIVl /// https://ali.ski/t7M7Q
Airpump: http://ebay.us/XPC6wo /// https://ali.ski/-Yc1r2
Lens cleaning fluid: http://ebay.us/WXS3GC /// https://ali.ski/MYvYl
Microfiber cloth: http://ebay.us/YpEifd /// https://ali.ski/6CzC7
Flashlight: http://ebay.us/1ouZGD /// https://ali.ski/lr1QH
Small brush: http://ebay.us/R54Rjh /// https://ali.ski/LEV6Sk
Permanent marker: http://ebay.us/GFUtke /// https://ali.ski/HOZKG