Been using Flipper Max on my 450 for the past four plus years. over the course of the last year it has started making a scraping noise when I clean the glass(see video). Doesn't appear to scratch anything. I replaced the stainless steel blade, but it still makes the noise. Any suggestions or other people having same problem? Can the blade be lubricated to reduce friction?
Flipper Max Noise
Flipper Max Noise