Menstrual Cups

Ally
Does anyone have experience using a menstrual cup in place of pads and tampons? I recently purchased the Diva Cup and have used it for my past two periods, but I can't seem to get it to where there's no leakage! It's comfortable, environmentally friendly, and definitely saves me money on personal hygiene products, but I'm having to wear a panty-liner when I have it in to protect against excess leaking. Maybe I am inserting it improperly? Any tips? Thanks!