Tried to wipe off a small spot w some furniture

Um, sorry to say. you may have damaged the unit. Panasonic plasma televisions have a coating on the glass front to reduce infra red emissions and reduce reflections.The only thing you should clean them with is a damp cloth (water only).
go to the local electronic shop and get a special cloth for cleaning flat panel displays and try that. if it doesn't come off with that, then it will need the front safety glass replaced.