On Tue, 05 Apr 2016 16:44:01 +0000, Jbad
wrote:

My Mom said that if you start at the top, the drips will make streaks and the
streaks will show when you finish washing the wall. I didn't believe her,
washed a wall from the top and the streaks made me crazy.

So you wash from the bottom up and have dirt from the top streak down
onto the already clean bottom wall. Are you a red bellied Brit or
what? Get a refund.