Nope, they didnt get wet. Sometimes I stack them on top of each other which can sometimes depress a button and drain a button. But I replaced the batteries just to be sure, and not surprisingly, they still didnt work.

I have an IR wireless keyboard, but I've had it (as well as my other appliances) for almost 4 years no problems.

I thought that maybe it could have been the keyboard so i shut down my computer and the remotes still didnt work.

None of the keys on my remotes seem to be jammed.

Today, my cable box remote is being more responsive. It can change channels on the cable box, but cant control any of the TV functions. (which it used to since it has universal capabilities)

If I have a neighbor with some sort of IR appliance, could that cause all my remotes to stop functioning?

No, I dont smoke but I will clean each remote. I dont have a cabinet, all my video appliances are all sitting on a shelf. So 'line of sight' isnt a problem. (ive walked all around the room clicking the remote and even aimed point blank -- no response)

I closed all my shades and windows to block out any possible neighboring IR rays. Still didnt help.

the battery compartments on each of my remotes look clean. No dust. But if they were dirty, that seems unlikely that they all became dirty enough to stop functioning at the same time.

I took the batteries out of all my remotes (in case one of the buttons was depressed and constantly shooting rays at my TV), and one by one, I would place the batteries back in and try to turn on my TV. Nothing.

So out of my DVD remote, my TV remote, my cable box remote, and my audio system remote, all of them barely function except for the cable box remote, which now functions perfectly fine.

My wireless keyboard (which is in the same room as my tv) also works fine. (never stopped working)

nope its an old tube tv. (4 years old) For three days, no matter what time of day, all the remotes were 99% unfunctional.

But they are now all fully working again.