I wouldn't use anything not designed for the LCD screen, either. Should anything happen, you'd likely have voided any warranty. Mine came with some solution and a microfiber cloth.
On a side note....when the cable guy was here delivering our digital cable box after we got out tv, he said to only use something made for the screen and clean it when it's cold. I don't know why, but he said not to do it while the tv is on and warmed up.