ive always struggled to get under the lip at the top, you know where most of the crap collects, i thought about it on the last job i did and last night i did one and it worked really well.
i got my extension pole with my mop on it, ive got a porcipine mop and pushed it underneath lip no problem and slid from side to sidepulled all the stuff down and got that visable bit really clean! then i rubbed the whole pain down with squeege off and the porcipine mop and just rinsed off with the pole, came up really really nice!
and ive been strugglin for ages scrubbing with pole never getting to that top bit, ill take on more cause i used to hate doing them