What's your best tip?

Have you go something in your cupboard that you swear by? Is there something someone has recommended to you that has really impressed you?
For example, what's your best tip for a dog with an upset tum?
Have you ever used Thorn-it? If so, what for? Magnetic collars? Stumbled on a great treat?
Why not share you top tips here!
I'll kick it off with one of mine...
Crazy Dog Grooming spray.
Before I discovered I lived just around the corner from the dog groomer of the year, I used to buy Crazy Dog Grooming spray in bulk! This magical spray seemed to make the comb fly through the knots.
What's your best buy and why?
Beverley, Editor

There's a lavender-based horse detangler by NAF Care that's stunning for
dogs, btw - and much better value than any dog detangler. TH Whites sell it
- £7.50 for a big spray bottle. We use it to give us a fighting chance to
de-burr the dogs during the SPBS (Salisbury Plain Velcro Season).
Jemima Harrison

What’s your best tip?
My Labrador has always been a great one for rolling in fox muck. It is not just the shoulder but the whole dog. Not only does she always seem to choose a cold day when I would not be choosing to bath her, but you can also guarantee that time is in short supply with other pressing tasks! Not only is it unpleasant aesthetically, but the smell is simply awful! There is also the risk of sarcoptic mange, which Pippin has had once.
The best way to eliminate the smell, which seems to linger even after thoroughly bathing, is to rub in tomato ketchup. Go for the cheapest you can find, and apply it liberally. Honestly, it is very effective (thankfully!).
Alison Logan, vet