I have never heard six times

I eat/breath and swing fire and I will tell you that I burn my wicks once to get them blackened before I even rehearse with them.
The flame tends to burn hot, bright and sometimes inconsistent on new wicks I have found so I like to burn them down before putting them near my mouth!!! That habit just carried over into poi, though I suspect that big, bright initial burn might be good for the opening to a show.

Have fun, happy burning and if I were you..I wouldn't waste burning my wicks 6 times...not when once is enough for me! Happy burning!
Pele
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Higher, higher burning fire...making music like a choir...