U used this wormer once, as it is easy to get off the shelf, I got a bit on my skin when I was doing it. It was not a nice feeling! and left a small burn mark.
My cats have very thick fur, so although the wormer seemed to work ok, I wasn't sure how much got to their skin, and if it felt the same to them as it did to me.
They did not like me putting it on, however it did not seem to cause them any discomfort when I had done it.

I think without a doubt you should send pics off to the company!

I have just been out to get cat wormer as it happens, and I got the drontal tablets. I much prefer pills, I find it so much easier to just 'shove them down their necks' and that way I know they have taken it, no problem.

For my new born kittens, I have panacur paste, ready for when they are two weeks, old. But I think this can be used on adult cats too, you would just need alot of it.