How and when do you break a child from being swaddled?

My daughter is over 8 months old and will only sleep well if she is swaddled. We have tried breaking her from it many times but always after a week or two of bad sleeping give in and swaddle her. She sleeps and soothes herself back to sleep better while swaddled. I just wonder if this is bad for her or I should just continue to let her be swaddled until she no longer wants it. Also suggestions on how to stop swaddling effectively would be helpful.