Enclosed cat litter box (Farlington PO6)

Needs a good clean as been outside. My old cat loved it but new one doesn’t. It has a pull out draw where the cat litter goes and a top you can leave open, if you want. The idea is the cat goes in the entrance and comes out via the lid and it definitely cuts down on smells. My old girl got used to it very quickly as I left the lid up for a couple of weeks for her to get used to coming out via the top. Once she was used to it, I put the lid down and she had no problem with it at all. Would ideally like it to go today. If interested , please leave a contact number.