I've refurbished my Optimus No.1 and cant get it to light. I'm using metanol and I light the preburner bowl which I fill from the fuel coming up from the jet, get it hot but still cant get a flame. All I get is gas/air from jet which doesn't ignite, after the burner pipes cool down I hear a gurgle and then ethanol starts to squirt out of the jet. Is the ethanol not suitable for this sort of stove ( becoming too rarified?) and should I just use paraffin which I just found out today is available in local shop?