Cleaning Camera - How to remove Particles on the Glass?

Since I sometimes work in a very dusty environment, I decided to follow the advice on the Fairphone Story on how to get better Pictures and clean my Camera (and my Phone) by taking it apart. The Effect was huge, especially between the screen and the Frame and the Earspeaker!

Unfortunately while doing this, I got some Dirt on the inside of the Glass cover of the Camera. I tried with a Q-Tip and some Alcohol but I think I made it much worse… Now there’s Dust Particles and Smudges and it makes the Camera much worse.

Same goes for the front camera, as I tried to clean the Hole-Punch Cutout…

So now I am in need of help, how can I clean these Areas effectively and get rid of the Smears and Particles? Or is it all lost and I need to buy new Modules? (that would probably mean new Cameras, Display, Camera Cover…)

Thanks for your help!

My Advice, don’t take those things apart to clean it, if your Environment isn’t absolutely clean, Dust will go in there and there’s no easy way to clean it…