My name is ***** ***** I’ve been involved professionally with dogs in the health and behavioral fields for over 18 years. It will be my pleasure to work with you today.
It can be difficult to teach a dog to accept the muzzle when the only time it is used is when you are either taking the dog somewhere they don't want to go or causing the dog pain. Dogs learn quickly to anticipate what is going to happen when the muzzle is put on. It can be hard now to do much since you HAVE to use it for treating the ears which are quite painful. Now the gauze loop is probably much the same as an emergency muzzle but I'll give you the link to how to do a muzzle.
Now your dog might be better with a basket style muzzle. They don't constrict the muzzle of your dog and are more comfortable. See one here:
The main thing is to stop the dogs association of pain with the muzzle. The way you can do this is to work with the dog on putting the muzzle on. The following site has a great video on how to accomplish this.
Now some people will use a towel or other head covering to help block the dog's eyes and treat the ears that away. Other owners will use a sling to lift the dog up off the ground to help prevent the twisting and movement and might help. Start training her to the muzzle and put it on and off multiple times a day giving great high value treats like hot dog slivers or raw liver and then take it back off. Let her association with the muzzle start being pleasant instead of just painful.
I hope this information is helpful to you. If you would like any additional information or have more questions please don’t hesitate to press the reply to expert or continue conversation button so I can address any issues you still have . If you do find this helpful, please take this opportunity to rate my answer positively so I am compensated for my time.