"If you can put it on your tongue, you can put it in your ear canal. Put it that way." But drowning the bug is just the first step - you should also seek an expert to ensure the bug floats back up ...

Yager, D. D. and R. R. Hoy (1986) The Cyclopean Ear: A New Sense for the Praying Mantis. Science 231:727‑729. Triblehorn, J. D. et al. (2008) Free-flight encounters between praying mantids ...