Maintenance Which exact cat litter do you use to remove smells?

I'm trying to get mold smell out of a vinyl doll and shoes and tried three types of non-clumping unscented cat litter:

1. Catsan, which is quartz sand and chalk. Didn't remove any smell after 5 months.
2. Jipp Happy Home, which is sepiolite, also a couple months. No effect.
3. Agriselect, which is alganite. This time the doll made the entire plastic container smell, I had to throw away the container itself.

After that, I put doll and shoes in baking soda, waited a week to check. Same effect, everything stank so much I did not trust it would do the trick without needing to replace the baking soda every couple of days.

I'm going about in the same as always: first soak doll in borax. When dry wrap in thin paper, put a layer of litter in a container, place doll on top and cover with litter. Used the same containers several times before. The litter would maybe smell a bit moldy, but the doll and container would be fine.

This doll did not smell funkier than other dolls I successfully removed the smell of. I *thought* I used Agriselect for them, but not sure anymore. Next, I'll try activated charcoal for the first time.

Which exact cat litter do you all use? I want to check what material it is and see if I can get the same type of clay or sand over here in the Netherlands. Not looking for other methods right now; I love how cat litter used to make the doll smell completely neutral.

 

I have soaked my doll in borax as mentioned. But was asking about cat litter without wanting to discuss other methods for now.