Just get some nice plastic screen protector which preferably is HD (meaning it doesn't distort the image at all and it's ~99.9% clear) and you will immediately see the difference.
Their wet install screen protectors always made the screen look bad in my opinion. Is this still the case?
They have odd color specks as if the water never completely evaporates. Honestly, the Spigen Crystal and the Illumishield Clear is damn good. I have the illumishields on my NVidia shield tablet and I forget I have a screen protector on and that opened my eyes to that brand. Besides both are cheap and comes in packs of 3 and they stick well with no halo effects. Feels more like glass since its hard plastic. The Skinomi techskins and the armorsuits wet apply skins gets dented and its not as clear and scratches pretty easily too and no it does not heal itself despite what it claims. Go ahead run your fingernails gently across it and see the dents and see if it "heals." None of the so called healing ever happened to dents or scratches.