Use a syringe device to gently direct water against the wall of the ear canal.

VOA: special.2010.03.31

Instead of being very direct, you can use "I don't know" to soften your response slightly.

但你不想说得那么直接，你可以用“I don't know”来让你的回答更为委婉。

I don't know 课堂 - SpeakingMax英语口语达人

it allows for direct banking. Right now,under the terms, we have to use a third country bank."

VOA: standard.2010.07.29