completely clean

I love the squeaky-clean feel of my hair after I've washed it. 我喜欢洗完头发后干干净净的感觉。

Someone who is squeaky-clean is completely good and honest and never does anything bad

Journalists have been trying to discover if the senator really is as squeaky-clean as he claims to be. 记者们一直想弄清楚参议员是否真像他自己所说的那样光明磊落。