After finding out why standard liquid detergent is never found in manual spray-bottles, it occurs to me that it wouldn't be too difficult to have one of the settings on the nozzle assembly (you know, where it says "stream" "spray" and "off"... and another "off") reverse the flow, ie: suck any liquid in the nozzle back down the line. This would keep the nozzle clear of shelftime-induced clogs.-- FlyingToaster, Mar 25 2012 I can see how this would be done, but I cannot see how it would improve the reliability of the device at all. You did realize that you can invert the bottle and squeeze the trigger to achieve the same effect, right?-- WcW, Mar 25 2012 //invert the bottle and squeeze the trigger// is going to make the contents run from the nozzle, through the tube back into the bottle ?-- FlyingToaster, Mar 25 2012 Narp.-- Alterother, Mar 25 2012 random, halfbakery