I switched to Blaze a couple of months ago. Until a week, it was working fine. But after that, the vessels got black stain. I washed the burners and it stays clean for two days. Also, the dripper tray does not help much as it has two holes for the stand to rest.
Milk drips through these holes and my cleaning work has doubles as I have to clean the tray, the stand and also the slab.