Display not working properly after replacement!

I replaced the display on my iphone 5c, following your guieds on youtube. All went well and without problems, was extra carefull doing it. I turend it on and there is a problem. Touch isnt working well, sometimes it does but most of the time, it is not responsive, sometimes it types letters itself, or more letters that I type. Opens different apps that I click on etc.

All in all it is not funcitional at all! What could be wrong with it? The conectors are fine, I ever whiped them with pure alchohol when it wasnt worink ok for the first time. Tnx for your anwser!