iPhone 7 focus issue

hello guys, I have this issue since a while w my iPhone 7 camera, that it just wouldn't focus properly. I followed this article: https://vkrepair.com/iphone-camera-not-focusing/ but I don't want to factory reset my phone - I believe that's a bit drastic.

The camera will not auto focus, and it's *always* (!!!) partially blurry.

Anyone else?