Bests & Worsts Reviews from Amazon

The bottle and lid are held together by a single thread - - that is ONE SCREW Thread. Upon using the item the bottle portion for the spray rig fell off! I re-attached it and a moment later it fell off - AGAIN. The solution to was to use duct tape and tape the bottle to the lid. The crystals may be a good idea to aid window cleaning but the product, the actual delivery device, designed by Fuller Brush is WORTHLESS. Go to the automotive parts and accessory store and buy a car wash bottle (also available at hardware stores to apply lawn and garden products) and then buy the crystals separately.