CAN THESE BE CLEANED? I SURE LIKE THEM, BUT THE DONT EVEN LAST A WEEK BEFORE I HAVE TO THROW THEM AWAY. I KNOW THEIR SUPPOSED TO BE DISPOSEABLE BUT I'VE SEEN OTHER POSTS ON OTHER FORUMS THAT SAID THAT THESE CAN BE CLEANED AND RE-USED CONTINUELLY. I DONT SEE HOW THAT WOULD BE POSSIBLE SINCE IT APPEARS THAT THE WICK GET ALL BLACK AND CHARRED.
