DO NOT USE LYSOL AROUND CATS - use a dilute solution of bleach. Lysol is poisoneous.
Maggots come from flies - so if you have a lot of flies in the house, its possible they have laid eggs - you should scoop the pans once or twice a day so that there is nothing for the flies to lay eggs on.
Maggots come from flies - so if you have a lot of flies in the house, its possible they have laid eggs - you should scoop the pans once or twice a day so that there is nothing for the flies to lay eggs on.