(similar for both bottle bioassay and larval assay)
When you are finished with your beakers (or bottles) or they have become
too old to use, triple rinse them with acetone and wash them with warm
Place the beakers (or bottles) in an oven to thoroughly dry before using
If you are uncertain whether the beakers (or bottles) are completely
clean, introduce some susceptible mosquitoes into the beaker after you
dried them. The mosquitoes should not die right away. If they do, clean
the beakers again.