[jikwan]

many ways to get these spots
best way is to to brush firmly up and down
you might notice that every time brush goes up it flicks the horizontal leds and sends a spray of water onto a possibly dirty topframe -water mixes with dirt and voila! a  perfect
bead of spots appear
solution? brush horizotally till you get beneath 1st horizontal lead
just in case there are still some who are still racking their brains