It sounds like you need to change your set up altogether. Rabbits can be litter box trained, which means you don't need bedding other than the litter in the litter box. Wood pellet litter is the best at odor control and absorption. It also doesn't easily get tracked out of the litter box or stick to their fur. If your rabbits are diggers and that's how it's getting kicked out, then putting a screen over the litter to prevent digging, would be something to consider.
http://wabbitwiki.com/wiki/Litter_traininghttps://rabbitsindoors.weebly.com/litter-training.html
If your rabbits are kept in a cage, I would also suggest you consider changing their set up to provide a larger area. It will provide them with a happier more enriching life.
https://rabbitsindoors.weebly.com/housing-options.htmlhttps://rabbitsindoors.weebly.com/free-roaming-how-to.htmlhttps://rabbitsindoors.weebly.com/bunny-proofing.htmlhttps://bunnyproof.com/
Also I don't know if you have two babies or fixed adult rabbits, but in case you aren't aware and they are babies, at 10-12 weeks old they will need to be separated before they sexually mature and fighting or mating can occur. Then if you want to be able to put them back together, they both need to be fixed, wait 4-8 weeks for hormones to fade, then go through the proper bonding process. But just know, not all rabbits that get along as babies, will get along as adults. So there is a chance that they won't have compatible personalities and will not bond with each other.
https://rabbitsindoors.weebly.com/bonding-bunnies.html
http://wabbitwiki.com/wiki/Bonding_rabbits_together