What over the counter non-tablet worming product do you recommend?

[TreasuredMim]

What have you tried that does the job with minimum upset to your cat?

Quantex spot-on. On prescription from the vet. It treats tapeworms and you use it in conjunction with spot-on flea stuff (you’re supposed to leave a week between them).

Cheers GiantCheeseMonster

Dronspot is good. DCat never even notices it.

AmandaHugenkiss that seems like what I'm after.

I can second Dronspot. We worm our boy every three months with this, he doesn't notice it at all.
We get it online with a subscription service