Hi, thank you for answering my questions.
Chronic itching of the ear canals can be due to a number of things. The most common are allergies (if your nose, throat or roof of your mouth itches often as well, it may be allergies), or a fungal (or yeast) type of infection that is chronic.
Ear canals are great places for fungal infection because it is dark and damp.
You might try a half and half solution of water and white vinegar to irrigate your ears with twice a day at first until the itching is under control, then daily. After a time, you may be able to reduce this to once a week.
The vinegar is a natural "anti-fungal" solution. If it doesn't work, the itching is most likely related to allergies.
Take care in drying your ears out each time you irrigate, but do not "stick" things in the canal such as Q-tips etc. I am sure you know this already.