I'm so glad you posted this Battle Axe. I too have had issues with my yellow Oliso. I thought it was something I did or didn't do. When I first got it, it would heat just fine on the cotton setting, but no longer. I went back to the Black and Decker as I read about so many issues about the high end irons. It's ok but I wish I had one that was hotter.
I had questions about the Panosonic staying hot. I was at a workshop where there was one and it kept going to auto-off.
I have been happy with other Shark products, I may look into that brand.