My cat used to do it I found this info helpful :
Scratching
Scratching is a necessary behaviour for cats, as it removes the outer husk from the sheath of the claw. Cats also have scent glands between their pads and this means that scent is released onto the object when a cat scratches on it – leaving a mark for other cats to read by smell, along with a visual mark as well.
Ask yourself whether your cat has the opportunity to scratch naturally? If your cat is kept permanently indoors, or does not go out very much, then an indoor scratch post will be essential. Posts will be used by cats to exercise their claws, otherwise cats may scratch your furniture or carpet. Scratching posts come in many shapes and sizes and should be introduced to a kitten as early as possible. Cats are highly motivated by scent; their sense of smell is 30 times stronger than ours and the smell of catnip is really attractive so spraying the post with catnip spray may encourage your cat to use it. Your post should be tall enough so that when your cat stretches it’s front feet upwards from a standing position, it does not overreach the top. The post needs to be covered with sisal or other scratchable material. Praise your cat every time it uses the post to scratch.
To help prevent your cat scratching the wrong surfaces, try to encourage it to cheek rub them instead. Research has shown that when cats are feeling secure, they mark objects and people using the cheek glands in their faces. Where they do this, they rarely scratch or spray. Encourage your cat to rub on your hands or a clean cloth and then rub this over the furniture.
Should you find your cat persists in scratching in unwanted areas around your home, look at where your cat is scratching. If it is in a location near a door or window, this may indicate that it is anxious about other cats coming into the home. If so, try to remove the cause of stress by blocking the cat flap and even access to the window.
We also used a small water pistol , so if she scratched we would shout her name do it again a squirt near her and 3 rd just touching her , she did stop but sometimes she would do it to wind me up as she would check I was looking lol
