Camera lens dust problem

@gvig remove the back cover and clean the inside of it to make sure there is no dust on those. If that does not work then it is possible the the dust is inside the camera and may require you to replace it. Let us know which one of the cameras so we can provide you with specific help on that. For example, and since iFixit doe not yet have a specific guide for that, use something like this guide It was written in SPanish so use a Browser that does the translating for you.

While you work on your phone, take lots of pictures. Once you are done with it, take those pictures and create a guide for iFixit. That will help the next person that has a device with the same issues as you do. It's easy and fun to create these guides. https://ifixit.com/Guide/new The iFixit community will appreciate this.

Repair is War on Entropy!