I'll write a bit more about what I've experienced...
We still pick as many ticks off as we can but we don't fret if we miss any as they will be dead soon. Picking them off helps keep tick borne diseases risk to a minimum. The ticks we find are dead and haven't gotten any bigger by gaining dog blood. One thing to think of...if your dog is on your furniture, bed, camping mat, in the tent...the ticks fall off rather randomly where the wife might shreek lol. So maybe after some outings keep them off of places difficult to see ticks or vacuum easily.
I've never felt the liquid stuff worked well across the whole body and would always find ticks full of blood attached still. Didn't matter the brand, and it was messy. I'm a believer in it now for sure, like I said as long as my dogs take well to it and its not degrading their health.