The model number you posted does not work to find the manual, so go to there website I posted below and find your manual, because one of the models that is close to your shows the filter inside the top that you remove, and it has some nice pictures of how to replace it, so go here and find your, sorry I could not be anymore help.
At the top left side it says search key word or product model, type in your exact model- like BCO-130t,
http://www.delonghiusa.com/index.php?products&catid=1I posted a live link, so just click on it and there website will open.
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