How can I get soap bubble out of my ears after shower?

Try peroxide. You can use peroxide and white vinegar (mixed 1:1) or try rubbing alcohol. The alcohol is very drying so is not best used regularly or it may dry out the skin too much.
Soap on ear. Use a towel to dry out the ear or a hair dryer on a low setting so you do not burn the ear canal due to the high heat.