Identify the word that should be removed from the sentence to make it grammatically correct.

Have you ever tried to get a toothpaste back into the tube?

a

The grammatically correct sentence is:

Have you ever tried to get toothpaste back in the tube?

The word "a" should be removed because it is not needed. The phrase "get in the tube" is idiomatic and does not require the indefinite article "a".

Here is the corrected sentence:

Have you ever tried to get toothpaste back in the tube?