The ear produces wax partly in response to irritation. Too much cleaning may cause that irritation. Always make sure that you can see the tip of it. Hold the Q tip as you would a pencil, just above the bulb. Never use ear powders unless given them by your vet.
Powders tend to cake up in the ears.
Use only commercial drops made especially for dogs, or prescribed medicines. Alfred A. Knopf Publishers, New York.