How do I clear or remove scoped variables

I am using requestScope and viewScope variables in my application

I need to remove the values assigned to those scopes at different times or clear them out

I’ve tried:

requestScope.clear()

requestscope.var.clear()

requestScope.remove()

requestScope.put(“var”, “”)

None of which works

How do I clear out or remove my variables

Subject: recycle()

i asked a colleague and he thought

scopedVariable.recycle() may work

Subject: I assign null → scopedVariable.something=null;