Cannot get 100% opacity!

Hey! I am getting pretty annoyed with my Photoshop tools. I have never had any problems with them before, but they seem to have max opacity at around 15% these days. It does not matter which pencil I am using, pencil/airbrush makes no difference and playing around with the settings does not do anything either... I have tried to restart my program, my computer and drawing pad but none of it seems to solve my problem. It has been weeks, or maybe even months, since I could draw with 100% opacity and this is a problem for me.

How can I fix it? Does anybody know?

I am using Photoshop Elements 12, Intuos Drawing Pad and MateBook x Pro!