Glass top stove little particles, question?

How to you clean the smooth glass top stove?

Sometimes after I remove a pot or pan from the heating element (circle), there is like burnt on material on the glass. I do not want to take a knife or something sharp to remove it.
I do wax the whole top once a week, but yet still rough spots around heating element.

I have let it soak with glass cleaner and scrubbed, but there is still little bumps on the glass.

Any suggestions?
Um, yeah Sany, there is a wax to keep it shiny and looking new.
There is actually a special wax for glass top stoves,