This is very dangerous thing to do with an Aerosol can../ you shouldnt make flame throwers out of them. they can become uncompressed due to their instability, and pull the flame into the can causing it to explode in your hands resulting in personal injury..
plumbing/welding torches have a flow back prevention, but even they have been known to fail from time to time...
good thing you kept your distance. props.
empty a can of wasp killer in a bucket of thick soapy ice cold water.. dump on them.. Dont use hot water cause insects can tolerate water heater up to 150F sometimes, cold water will slow them down and make them less active, 50F or lower.
wasp killer will mix with the bubble and stick to them better..