Yes.
Nothing, this is ok
This is okay, but it is best not to touch the layer of material between you and the screen.
Not if your mattress has metal springs or it is thicker than 6". The metal in your mattress will block the field. You could make your mattress a bottom screen if your mattress has continuous springing i.e. the springs are all connected together.
NO, definitely not, the mains electricity in the electric blanket will completely disrupt the field from the Aura Cleanser.
In the UK this is known as a mattress cover. The bottom screen should be within 6" of you, under a mattress pad is okay but not under the mattress.
NO, metal will block the electric field and should be removed (a wedding ring could be left on). Metal belts, zips, watches etc will block the field.
Yes. Keep all mains powered devices away from you when using the aura cleaner, the electrical field emitted from these devices will adversely affect the cleanser.