I have been introducing small amounts inexpensive, commonly available, over the counter clotrimazole 1% cream on a cotton "Q" tip in my ear for around 30 years whenever feel a minor irritation. I don't try to reach the ear drum, but rather twirl the clotrimazole 1% off against the ear canal sides, withdraw the Q-tip and then pinch the external base of the ear between my fingers to move the cream against the inner surfaces of the ear canal in such a way as to spread the cream.
Clotrimazole is not only antifungal, as it is well known for, including documented use for otomycosis. Less commonly understood it also has antibacterial action primarily against some gram positive bacteria. See below graphic where "MBC" (minimal bacterial concentrations) and 24/48 hr levels of strain control for staphylococcus and streptoccocus are induced.
Clotrimazole 1% cream usually has benzyl alcohol in it. This is commonly understood to be a compounding ingredient for both ingredient blending and keeping bacteria from growing on a product. However, it is also has analgesic
properties and this is probably what quells ear canal itching (in my case due to extended usage of earplugs).
[I also use a bit more clotrimazole 1% cream on several Q-tips to clean my dogs ears - a very straightforward process.]