Late to the thread (I earned the handle). Sorry about Winston .
Were it me... I'd take a small 1 gallon pressure sprayer (like used for spraying herbicides/pesticides in gardens and such), fill it with 100% bleach and soak/spray every reachable part of the cages, inside and out, let set for at least 15 minutes, then rinse with water. The bleach should kill anything and the water will rinse it away to alleviate burning the buns feet and eliminate the fumes associated. If you can take the cages out into the sun when doing this, so much the better. Alternately, if you have a large enough "tub" you could put the bleach in and then dip each section of the cages to ensure all parts get dipped... Just what I'd do.
Were it me... I'd take a small 1 gallon pressure sprayer (like used for spraying herbicides/pesticides in gardens and such), fill it with 100% bleach and soak/spray every reachable part of the cages, inside and out, let set for at least 15 minutes, then rinse with water. The bleach should kill anything and the water will rinse it away to alleviate burning the buns feet and eliminate the fumes associated. If you can take the cages out into the sun when doing this, so much the better. Alternately, if you have a large enough "tub" you could put the bleach in and then dip each section of the cages to ensure all parts get dipped... Just what I'd do.