why? chilled spark gap tips gives more spark?

[JAMZZ333-at-aol-dot-com (by way of Terry Fritz <twftesla-at-uswest-dot-net>)]

I recently chilled my spark gap tips with with a butane gum remover DO  NOT 
do this unless you have a fan to get rid of the butane gas or don't feel the 
need for hair on your arms or face (it is highly flammable as I am sure you 
know) any way for about 5 seconds when the coil is running before the tips 
heat themselves back up again I get about 20-25 percent longer streamers from 
the torrid which is the head of a dart ( have a rather small (TC) about a 
foot tall but anyway I thought it a bit odd anyhelp would be greatly 
appreciated. thanks -James