The question is why you lubing it in the first place?
Because it seizes
somethings not right then, its a plastic sleeve; have you ever stripped the post out and cleaned it? how old is said bike, has the seat sleeve ever been replaced?
I am down in wellington if you need any assistance; thebromptonman.com
@Alf0nse started
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The question is why you lubing it in the first place?