What about Absorbine Jr?
I use Absorbine Jr. for athlete's foot, which is an occasional problem. A few days ago, I was running low, so I bought a new bottle. Estimate a week ago -- I don't have the cash receipt, but I know exactly what I paid. I bought 120 ml for $7.99 + tax = $9.05 Canadian. The theoretical expiry date on the old bottle, which still has enough to keep on using for a while, is "2011 MA", but as far as I'm concerned, it's still working fine, so that much is not so relevant. The new bottle says "EXP 2027/AU". But I'll ignore the date because long experience tells me that I'll be able to keep using it for years, again. But what I was thinking was, "I wonder if a tick would bite this stuff?" Seriously, I don't know if I need to use "Off!" on skin that has been treated with Absorbine Jr.?
I might add that last week I found what might be very small new bites. It could be they happened long ago, but I didn't notice them. It's an annoying thought though. Most of the earlier bites are healing and going away. But if any of the bites are really "new", then that means I've encountered live ticks recently, and I was hoping that I'd eliminated the all by now.