To clean a bird cage, clear out all the seed husks, shredded paper and droppings etc, and then wipe all the surfaces with a mixture of half water, half vinegar.
Rinse with fresh water and dry with a clean cloth.
Make a little ‘tree’ and prop it in the cage.
The bird will have fun climbing it and sharpening its beak.
 
It is easy to keep a bird entertained and you do not need to buy all those fancy geegaws from the pet shop.
You can use plastic bottle tops, cardboard loo rolls, and old bracelets and necklaces hung from the top of the cage.
Don’t forget to cover the cage at night so your little feathered mate gets a good night’s sleep!