Over a month ago I fixed a bunch of things that were faulty on my iphone 4. I replaced a battery, the home button and the headset speaker. Yesterday the display went crazy for no reason, so my first guess was that it got wet or something, so I opened it again, disassembled it, cleaned every circuit with a brush including the ones inside the panels on the board. Connected it all, assembled it again and ran a DFU reset.

The problem persists, the display works fine for a while, but crashes again after a couple of seconds, then comes back on.

The best description to the problem is what I said on the title box, it's like a bad TV reception, the display mounts on itself, sometimes I see the time display on the bottom.

I have read that some people here had a similar problem, but no solutions given. My guess is that it might be hardware related, although I find no reason for it to be so. Has anyone fixed this? If so, how?

Thanks