What, May, you are tired out?
What have you been doing?
Oh, yes, washing the scales off the leaves of your mother's window fern.
It must indeed have been a task; what did you wash them off with? Why did you use soap suds?
Because your mother told you to; well, that is a good reason, but why do you think she told you to use soap suds?
You say you don't know, but you think very likely these scales are some sort of bug, as everything nowadays seems to be bugs.
Well, I don't know about everything being bugs, but those scales certainly are. They are scale bugs.
Did you stop to look at them under the magnifying glass?