I just bought a Bodum coffee press. I must say it makes the best coffee I have ever made at home. I noticed that Bodum sells replacement mesh filters on their site but it doesn't have any information on how often you are supposed to change them. Does anyone have any suggestions on that? Also, somebody at worked told me, after I bought the press, that making coffee in it was bad for your health. It was explained to me that there is more coffee oil in the coffee and it could raise my cholesterol. Is that true?