Touchscreen not working properly anymore

Hi!

My touchscreen doesn't react to my fingertips anymore. The Pen still gets recognised though.

Does anybody know about this problem?

Thanks in advance and many greetings

Yureaka - WiFi doesn't work properly

I bought Yureka on second sale of January month. Everything was fine even after Lollipop update. Few months ago, I flashed Yureka cm12.1 nightly and I didn't see any problem with that also. But two weeks ago, my wifi started misbehaving like not turning ON and switching OFF automatically and sometimes it doesn't show the available wifi networks. Eventually it stopped working completely. I thought that the flashed cm12.1 kernel is the culprit and so I flashed the original stock CM12 lollipop ROM. But the same problem still continued. I tried several ROMs such as SOKP, MIUI 7, CM12, CM12.1(nightley). I had same problem in all.
NOTE: Whenever I flash a new ROM, it works fine for few minutes or even hours, then it starts to misbehaving and finally stopped working. I don't think this is hardware failure, because after every flashing of ROMs, it works fine.
Someone please help me. :(
One more thing, whenever Wi Fi doesn't work, wifi hotspot and even bluetooth are also not working. :(:(:(

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Phone tinkered with before, but not rooted. Need info on how to root it properly

Greetings! I need assistance rooting an LG Optimus F60 that has been tinkered with before. What I mean is, I had a guy unlock my phone since I switched carriers, and if I recall correctly( though not very sure) he used a few apps like kingroot to gain permission to unlock the device. He did not root the phone though, and I want to root it now(several months later).

The problem I stumble upon is that flashing SuperSU zips did not work. I have the app, but the binaries could not be pushed. I have tried manually pushing the binaries, but I was denied access...

I hope someone understands my problem and is able to help. I am more of a PC tinkering guy, never got into "hardcore" android customization, but I would really like to install apps on my sd card.
Thank you for reading, It should be solvable, and also sorry if my issue is common and/or has been posted before, I tried searching, but couldn't find anything(maybe I did not search good enough, sorry!)