Yes he is going to fight it, because his ears are raw and bleeding. Not a good scenario.
What I'd do, is ask the vet how to prevent the situation rather than treating the symptoms after things go south.
What diet is this dog on? If it's chicken based, or has corn, wheat, soy and/or by products, you might want to switch to a "unique protein" source such as fish or venison.
Also ask about benadryl to help with the itching.
It's probably yeast-based and it does itch intensely. Please work with your vet to find a solution. Don't wipe with a tissue without using a mild/gentle ear cleanser and/or medication. You'll only make things worse. Plus with all the open sores, there will likely be bacteria invading so you have not one, but two issues going on.
DO look into Vetericyn.
We have cured a few dog ear infections now with it.
Vetericyn - Wound and Infection Treatment - Broad Spectrum Antimicrobial
******************************(from the website, below)
Non-toxic and Non-irritating
Commonly used wound cleaners such as hydrogen peroxide damage tissue on a cellular level, and may prolong healing times. (Not recommended for use in cleaning out wounds.) Vetericyn is a strong oxidant - it disrupts the cell structure of the pathogens (germs) and adds oxygen to the wound area, speeding healing times.
2) Otitis externa - A very large dog (115 lbs) who originally presented for a secondary yeast infection (cytology) on a Friday. I sent ear cleaner and Otomax ointment. The owner called the following Tuesday to say that when she cleaned the ears she was now getting a thin ropy brownish material from both ears and the dog was very pruritic (itchy).
On recheck, it was predominately gram negative (sent off for culture and was Proteus mirabilis, resistant to almost everything but Baytril - the owner about passed out at the cost of Baytril or Zeniquin.). The owner wasn't able to clean the sore ears at home so I boarded the dog and cleaned the ears (filled the ear canals with Vetericyn solution, placed a cotton ball in the opening and rubbed vigorously) twice daily, followed by Otomax ointment. Within 4 days , the dog was doing much better and I sent home to continue treatment for the next 2 weeks.
I have treated several cases of yeast and bacterial otitis externa and have found that Vetericyn alone is not very effective as a sole agent and still send either Otomax or Tresaderm to use after cleaning. The nice thing is that Vetericyn does not irritate a sore ear and is safe even if the tympanic membrane is ruptured.