The writer lives in a hard-water area and recommends the Kärcher Window Vac WV 2 to get rid of streak marks on the shower screen.
Kärcher Window Vac WV2 Review - ET Speaks From Home
I tried window vacs to get rid of condensation and prevent mould - a bargain version was better than Karcher's
Karcher Window Vac WV 6 Premium review: great for windows and more
This Karcher Window Vaccum Is Ideal for Hard Water Areas
Karcher WV2 Plus Window Vacuum 12 month user review
Streak-Free Cleaning - The quick and easy way to clean flat surfaces, such as windows, tiles, worktops, condensation and mirrors leaving a sparkling,
Karcher WV 5 Plus N Window Vac
Kärcher Window vacuum cleaner WV 6 Plus Multi Edition
Window Vacs
Karcher WV 5 Plus N Window Vac