Thank you for confirming,
Unfortunately, the issues you are experiencing are symptomatic of an internal hardware defect, since it has happened immediately after cleaning and because it was a "wet" clean, that really does point to lcd panel damage. Though it may not have been dripping wet, any amount of moisture, especially if it was a solvent type (like windex) getting down into the bottom edge of the screen where the panel tab bond connections are will quickly corrode and short out those connections, which is not repairable, this is permanent damage which cannot be fixed without replacing the entire screen assembly. That type of repair is not feasible, as the cost of the part is 80% or more of the value of the tv, and then would be several hundred more in labor costs to have the old tv electronics (which may have damage too) stripped down and rebuilt around a new panel.
Just to be sure though, here is one step you can take here, both as a possible fix, as well as a diagnostic evaluation:
1) Unplug the power cord from the outlet
2) Wait at least 1 hour (60+ Minutes)
3) Press and hold the power button (on the set, not the remote) for 60 seconds
4) Keep holding power button while plugging back in, and for another 60 seconds after. When plugging back in, go directly to the wall outlet, bypassing any power strips or surge protectors.
If this reset process does not work, it would unfortunately confirm an internal hardware failure. At that point the tv is not going to be feasible to fix and buying a new tv is really the only practical option.
My apologies for the news,