Don't mix. We've bought a new bed and today was the first time I turned the mattress. Got hold of lift, gave it a good tug and whoosh! The bed (on casters) shot across the laminate floor and the bottom section cracked me right across the top of my feet. "Why, bless me" I said.*
So if anyone has any ideas about how to stop a bed from sliding around on laminate floors please let me know!
I'm lying about this bit.