How can I use the words DUE TO and BECAUSE OF....

Hello Everyone. There are two words DUE TO and BECAUSE OF, Seems that the meaning of both them almost the same. But there are some differences between them. Could somebody explain to me how to use them in different situations. Thanks in advance.

In everyday conversations, you can use them both interchangeably. However, "because of" is more common. "Due to" sounds a little formal.

However, when you are doing formal writing (for school or work, etc) , remember this rule: "due to" has to follow some form of the verb "to be." For example: 

- Her bad grade <em>was</em> due to her not studying for the exam.

- My wet hair <em>is </em>due to the rain outside.

In short, if you make a sentence with "due to," the format tends to go like this:

[Noun] [to be] [due to] [noun].

"Because of" is, I think, used in every other situation.

- Because of the rain outside, my hair is wet.

- My hair is wet because of the rain outside.