Anti scratch spray or device for furniture, is there anything that works?

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Sofa is getting a battering even though they have scratching posts etc.

The reviews on Amazon for various sprays are pretty bad and most seem ineffective, is there anything that works?

We're just about to temporarily cover the ends of the sofa in sellotape. Apparently they don't like it.

I use double sided tape on the carpet in the most frequently attacked areas, that works for mine, though she does then go for different areas 🙄

Double sided sticky tape or plastic protector, try amazon. I think lemon juice is meant to deter but not here