I am using zinc wicks I think, it has been so long since I bought them and I dont have the packaging but I have real problems with the soot leaving black marks on my wall and if I have a bunch of candles burning at a time then I have problems with, Sorry if this is to much info, when I blow my nose there is a bunch of black stuff. IS there some other kind of wick I can use so I dont have this problem? Thanks:p