Brake Cleaner is really good for killing wasps in mid-air! Spiders too!
Bad for bike parts though! Unless completely removed from the vicinity. (i.e. chain off the bike and soaking in a bottle!)
L8R
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"Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and loudly proclaiming, "WOW, What a Ride!" - unknown
"Your Bike Sucks" - Sky Yaeger