Canon PowerShot Inside Lens Cleaning and Lens Curtain Reassembly

I clean the inside of Canon PowerShot SX720 HS lens. This could probably work for other models of PowerShot as well. I also show how the lens curtain is reassembled in case of accidental disassembly. The lens curtain does not need to be removed for cleaning but may fall apart during the cleaning procedure and be difficult to reassemble.