Has anyone ever heard of this natural treatment for cat fleas?

I saw something on TV, where a woman recommended a solution of water and vinegar to repel fleas on cats. Has anyone ever heard of that? Does it actually work?

It won't work, and there is a chance the vinegar will irritate the skin. The best flea treatment is at your vet. There is no natural way that will kill fleas and eggs on the cat and your carpet. Make sure you buy at vet and not your local pet store unless they sell vet recommended treatments. They might be more expensive, some Feed stores also carry them.