Altering contractions Using String Manipulator or Regex

I’d like to alter contractions in a group of Tweets using either String Manipulator node or Regex Filter. Regardless of what I try, it seems I can not consistently remove the same contraction. For example, I’d like to change “I’m” to “I am” or remove the apostrophe all together. I have manage to make both Regex and String Manipulator work but only partially. They will either remove the first instance they find and skip the remaining or split the “I” and “m” leaving me with “I am’Iam”. I believe the issue is with the apostrophe but, like the contraction, can’t seem to consistently remove apostrophes. Any suggestions would be welcomed.