Bob, it seems to me that you can afford to put your tubes closer into the exaust. This will burn more of the fluid therefore leaving less of it on the ground. Its obvious that the residue being left on the ground is unburned fluid so there are only two solutions for that.

1) make sure to get all the fluid burned (it may be possible by simpy bending the tubes closer in to the exaust)
2) use less fluid (in return assuring that nothing is left unburned)

Just my opinion, maybe Tam can give you some better ideas once he gets back into town.


Dave