It is going to be a time that you will notice a small dark spot on your picture. And you will think that there is something in the lens. And you will wipe it. But that little !^%$ wil still be there. Then i got some news for you. Most probably you have some sensor dust.
So when it comes to this scenario, the solution is one, cleaning your sensor!
I know it sounds intimidating and you already think that this is only to be done by NASA technicians!
Well i have good new for you! You can do it at home, for under 30$.
Check out my new post and find out how!
https://www.thephototalks.com/photogear-talks/589263_cleaning-your-camera-sensor