Opening the wax hermetically sealed cork on reed diffuser? i've tried pushing and pulling. i have my diffuser bottle, the oil's...

i've tried pushing and pulling.
i have my diffuser bottle, the oil's inside.
but i am not sufficiently expert to take out the wax-sealed cork stopper at the top.
can you relief me?
I entail to regrout my shower?
Answers:    I used a wine corkscrew and it worked but I still had to do some tugging on it. Be alert that when it does pop off it doesnt distribute oil adjectives over the place. This may sound dumb but did you rupture off the wax covering? It is purely a thin section of wax you can peel stale to get to the cork. HTH
Scratched plastic?