i got a filter today and *tried* to install it, but it is hard as heck to get in. i've been reading that all of yall that have them say they are a tight fit...but this is crazy. once i push the filter down, it takes a LOT of pushing to make it tilt back into place. and if i ever get it 'in place' i can't get the lid closed for the life of me. i almost think that its not shaped correctly at the rounded corners, but i dont know. were there any other tricks yall had to do to get this thing in and close the lid???