Re: Towel Treatment
Dan, I am about 40 miles from Johno and follow pretty much exactly the same treatment protocol. Like him, my State inspection yielded 0 mites in March in an apiary with 16 hives. I found 3 mites on the board of one hive yesterday so as soon as I get a dry day, the supers are coming off and everybody gets their first treatment of the year. Last treatment was Christmas.
I use a Provap110 and am pretty sure this method of applying OAV is superior to the pan type. You should buy one one Johno's Easy Vaps and give it a try. You will never go back to using anything else.
Thankfully, the bees are smarter than I am. They are doing well, in spite of my efforts to help them.