I have tried a few different things. I will try something for a while and then think or hear of a new technique and try it out. The very first thing I did was sit on a small bathroom floor with them and pet them. A couple times I turned the shower on to create some noise and maybe stress. I have swapped litter boxes between them. I have put them in a small laundry basket just big enough for them to be side by side and pet them. A couple times I put them on top of the laundry dryer in this basket while the dryer was running. I have also carried them around in the basket to create some movement. Sometimes I would just watch TV with them next to me in basket. The latest thing I have been doing is putting them in a pen made of storage cubes with a litter box and some hay. Sometimes I will give them their veggies in the pen together. In each of these settings they have lunged and pulled a bit of hair out, mounted (both have mounted the other), and Sheldon has sprayed Lilac with urine. I have never noticed anything that causes this it just kind of happens. They have also made progress in each of the settings by being affectionate and grooming each other. One day they can be this way and then the next time I try they end up lunging and pulling some hair out and Sheldon sprays her. I’m so confused. Sometimes I feel I should just put them together and let them work it out and not worry about it.
Yesterday I actually switched their cages. I put Sheldon in Lilac’s cage and then put Lilac in Sheldon’s cage. They sniffed their new surroundings for a little bit and then didn’t seem to care just went about their normal business.

Any advice?