Answer:
I know exactly where to start my research: the library.
I'd say the answer is - After I laundered my cell phone in my pants, I mad sure to track where it was, especially when close to water.
It specifically states that the pants were laundered with the cell phone in them, and that he doesn't want to make that same mistake again.
The poem 'Harlem' is an example of free verse. The meter is irregular and there is also an irregular rhyme scheme (2nd line rhyme with 4th, 5th with 7th and 9th with 10th)