I use the nasal spray into the ear canal. The nasal spray is readily available over the counter.
Whoops! Missed that you meant in the ear canal.
Yes, using the nasal spray in the ear canal is a cheap and available way of getting steroids in there. But that's not a great idea for maintenance therapy, since chronic steroid use can cause ear canal skin breakdown. Not a bad solution if you have a really painful ear and you can't get topical antibioitic and steroid drops.