Hamsters
Hamsters should be kept clean and dry. A jam jar placed on its side will often be used by the hamster as a toilet and this can be cleaned out quite easily. Use essential oil to wash the cage, just as for rabbits.
Hamsters seem to like the smell of lavender, which is handy because it is antiseptic and antibiotic and will keep the hamsters healthy.
Add 2 drops of lavander oil to 2 litres of water and swish this around the whole of the cage after you have washed it in the usual way.
If your hamster has a high temperature, leave it alone. This can be rather difficult to do because the creature may look so ill as to be almost dead, but it will soon recover so don't panic. Hamsters store their food and this can rot, so use dried herbs and essential oils on the floor of the cage to prevent maggots.
Reference: The Fragrant Pharmacy:V.A.Worwood