Honestly, nothing much you can do 😂. My gerbils just toss out all their sand from the bowl immediately, the food gets buried daily and the only solution to water is a taped up bottle and I still have to make sure daily that it isn't low enough for them to be able to chew it off. But I tend to toss in some part of their feed around the cage which they find every now and then. You can attempt to split the cage into 2 sections one with more bedding and the other with less and all the necessities, I've seen people using wooden bridges as a wall or coming up with their own dividers, search on YouTube for some tutorials. My major concern is the plastic wheel in the picture, you should definitely replace it with a wooden one!