Have lay on her side and put either hydrogen peroxide ( using eye dropper ) into ear and let it bubble for 20 minutes. the other thing to put in is a mixture of half hydrogen pperoxide and rubbing alcohol. Please be careful as hydrogen peroxide can burn the eyes so don't overfill. This was told to me by a dr many years ago for the wax build up for my son who wears hearing aids. I have used it when I have itchy ears from time to time.... Usually recogmended to roll over and do the other ear also just in case....

Both me and my Mom had this a year ago.
The MD said to my Mom that she , "may have an inner ear
infection."
He was right but offered no solutions. I know Dr. Clark protocols
and washed out our ears with peroxide and warm water.
Put some herbal garlic oil drops in them.
Found a frequency for these rascals that may have made a home in
there and set the frequecny generator to 60 Hz.
No more itcy ears after a few dayz.