Everyone has their tactics for achieving smear free crystal clear windows. But the real secret is in the drying. The new WV50 Window Vac from Karcher sucks surfaces completely dry removing all irritating streaks without drips. For best results we recommend using the Karcher window cleaning agent & applicator-bottle accessories. The WV50 is a handheld product making it easy to use & achieves an expert finish with one satisfying swipe. The WV50 is light weight of just 0.7kg you can clean up to 45 windows which can be achieved in a single charge (Statistically based on an average UK window size of 1 x 1.5m & the devices ability to clean up to 60m? per charge). The Karcher Window Vac is cordless with a lithium-ion battery making window cleaning so easy! It can be hard to achieve an expert finish with standard cleaning products which is why it is estimated that 75% of UK households outsource their window cleaning. The Karcher Window Vac is incredibly simple to use & achieves professional results without the hard work saving time & avoiding the constant need to pay for a window cleaning service!