I've got a bit of an issue with wax deposits in the float bowl of a petrol mower. Twice this year it's blocked the main jet and left it only able to run with the choke on. I cleared it out again today and got about a pea-sized amount of wax out of it. I suppose that most vehicles are injection these days and wouldn't have much trouble from a little bit of soft wax, but small gravity-fed carburettors are another matter. Any ideas?