Hi,
Since she started a clutch, she will probably lay 4-6 eggs this time. You can let her do this, as long as she stops after up to 8 eggs. Go ahead and take the eggs away. Then I think you have a good idea of putting her in a smaller cage at times. You might try using the smaller cage as a sleeping cage, but don’t cover it or make it too cozy or she will think it’s a wonderful big nest! Continue with the shorter hours and other changes that are possible. I will mention that some laundry rooms stay warmer than the rest of the house, so if she starts another clutch, you may need to find a solution that involves relocating her cage. You can also take her to an avian vet for a hormone implant. They have a good success rate and can last for a few months, but it is expensive. I’d try rotating her between the small and large cage first and see if that helps.
Thank you for asking Lafeber,
Brenda