The streak isn’t the mirror.
Every mirror clean ends the same way. You get it looking clean, then you tilt your head and there’s a streak. That’s not you doing it wrong. Every glass cleaner leaves a chemical film that dries into visible marks the moment light hits it from the right angle. This fortnight, Oskar cleans a mirror with micro-dry steam. Spray with the lance, wipe with a white cloth, polish with a blue one. No film, nothing to catch the light. A mirror that stays clean when you tilt your head.
First time, use the triangle
If it’s the first time you’re steaming a mirror, use the triangle attachment with a microfibre. It strips off the layers of chemical film that years of glass cleaner have built up. Every maintenance clean after that is just the lance and a wipe. The extra step only happens once.
Watch the episode on YouTube