If your kitten is too dirty to bathe, you can consider the following methods to clean it:
Wipe with a damp towel: Gently wipe the kitten's body with a soft, damp towel to remove surface dirt and dust.
Using dry shampoo: You can buy dry shampoo specifically for cats and use it according to the instructions. However, be careful not to overuse it to avoid irritating the kitten's skin.

Regular brushing: Kittens have soft, thick fur that easily attracts dust and dirt. Regular brushing helps remove dead hair and dirt, keeping their fur clean.
It's important to note that if a kitten has a skin condition or other skin problems, it's recommended to clean and treat it under the guidance of a veterinarian. Additionally, if a kitten is very dirty, it's advisable to take it to a veterinarian for a check-up to ensure it's in good health before cleaning.