Hi girlies, Well here I go on my first month of ttc! So excited! But.... I bought a cbfm on eBay a while ago, was a bargain! Thing is I'm not sure if I have cleared the previous owners data?! When I got it and turned it on it said day 19. So I turned it off and put new batteries in. Then held the m button until it went to day one (that was yesterday, period came during the night so yesterday was day one I think, then I realized I had set it at night so have just got up and set it to day two) have I done the right thing??? Any help appreciated!!