I clean the litter boxes once every month and I use soft soap and hot :!: water. Test have shown that really hot water is the best way to clean a litter box. Kills most of the germs.
Cats often doesn't like the smell of lemon, orange and ammonium so as long as the "whatever you clean the box with" doesn't smell like any of the mentioned things it's probably OK. And as for allergies, if you rinse carefully with hot water there should be little risk for allergies against the cleaning agent.
Cats often doesn't like the smell of lemon, orange and ammonium so as long as the "whatever you clean the box with" doesn't smell like any of the mentioned things it's probably OK. And as for allergies, if you rinse carefully with hot water there should be little risk for allergies against the cleaning agent.