Alaskan Malamute ear infection help?

My Malamute has a bad ear infection in one ear and needs to be washed and ointment applied twice a day. The vet did it today in the morning and I tried just now for the night but he freaks out and bit my finger so I had to stop because I couldn't get him calm. He has never bitten before and has only had problems with resource guarding in the past. What should I do to apply his ear medicine? Buy a muzzle and pin him down and apply it? I feel like that would damage his trust in me.