[souffle]

You really should see a vet with your hamster. You must not use the earth on hamsters as it can get in their lungs and cause chest infections. The ivermectin should be in a spot on that is in a pre measured dose. There have been outbreaks of these mites in the UK and they are actually bird mites which need specific treatment. Some of them are not being killed by ivermectin and need a different treatment. You also need to treat the environment and the treatment needs repeated monthly if that is what the vets says it is as they just reproduce and they get reinfected.