Hi, I tested excel for a few months a while back and i found that cd wicks worked best in it . I had a few problems with it , first it did sweat with some fragrances , I made up candles with excel and c3 to test side by side and the candles that was made with excel would sweat , not in all fragrances but some whereas the c3 never sweated at all. Also when I got all my testing completed and ordered another big batch of the excel it didn't behave anything like the previous batch , my previous wicks didn't work anymore and some of my candles appeared to have a scrambled egg appearance on top this was using the same oil and methods I had previously used with success. I did get good ht with my candles , i found the ct wasn't as good as c3 though . After the second batch I decided not to continue as I didn't want to use a wax that was that inconsistent . Hope this helps .