nexus 4's part of the screen suddenly stopped working

Today i was watching video on YouTube and play store was updating some apps in background. Within 10 seconds YouTube app crashed so i closed the app and suddenly my screen started to twitch (homescreen stuck between page 1 and 2 and constantly moving back and forward). i hit power button once and wake it again then i realized that i was unable to complete my lockscreen pattern because it was loosing the touch between 2 dots. i restarted the phone hoping it would start to work again but the problem was still there. i read on the internet that it could be because of the water contact. so now i disassemble my N4 and put it in bag with lot of silica gel pouches. I'm gonna reassemble it tomorrow hoping i that it will solve the issue. my phone is out of warranty now and I've already replaced my screen 3 times before during warranty period for various reasons.

anyone has any suggestions? please comment

before putting it in the bag i updated my official CM rom to latest nightly but problem was still there.