Stuff that bombs are made of

I saw WW doing something at the washbasin.

So I asked, What are you doing?

He replied, Cuci (washing)

Cuci apa? (washing what?)

Cuci la-sam (washing dirt)

Of course you're washing dirt off something; why would you be washing something if it's not dirty? -_-

So I prompted him for more info. Can't remember what I said, but it was probably along the lines of What dirt?

And he said, Using toothbrush to wash, otherwise I cannot reach some places.

But washing what, for goodness' sake?!?! Again not in these exact words, but I was already frustrated.

Only after that did he say, Washing my drinking bottle.

And he says I get mad for no reason. -_-

This always happens, by the way. I always have to ask multiple questions to get an answer that could have easily been given at the first question. Aaargh!!! So annoying. Not to mention a waste of time.