Usually what gets in goes out, but you are fully right sometimes I use nose pliers or a bigger cut at the bottom (... if you are really impatient, just cut it and get another recycled bottle) - really not an issueOK, I thought the water sucked in from the bottom....interesting. Is it hard to get the fiberfill out during changes? Looks like it would be tough to get it out through the small opening at the top.