All the colonies in one apiary now have the DIY thymol treatment on. I used 40ml on two sponges on the full colonies and 20ml on one sponge in the Nucs. Quite surprised at how much of the smell goes once it's dissolved in the surgical spirit but there was some bearding of bees at the entrances after an hour or so.


I used bog standard washing sponges cut to fit under the crown boards, do I expect any of the sponge to remain when I look next and have some replacements ready or will they leave them alone?