You are mopping it too much. No hardwood floor should be subjected to 5x per week of cleaning...
Dry swiffer it.
Sounds like you are going to have to back off the cleaning....really. Use vinegar and water to remove the build up.
If the shine is gone - because of the over-cleaning...have someone come in sand them down (if they are real hardwood) and put a new gloss shine on it.
If you do the vinegar and water to get the gunk off - you can use the Orange glow product like this:
and it should help. STOP mopping every day. Dry swiffer and wet wash ONCE a week, IF EVEN..