They remove it 30 days after payment even if you settle for less. Its automatic.
I settled for 40% but it took a few calls. If I recall correclty, it wasn't until the third call that they finally accepted/relented. My spiel was as follows:
Always be polite but firm. Also, bear in mind the first person you speak with (on each call) is likely a lower level rep and, therefore, unlikely to have the aurthority to negotiate much. However, they can and will escalate to someone who does. In my case the frontline rep escalated to an Operations Manager but then needed a VP to sign off on the 40%.
Lastly, I'm speculating but I think end of the month is a great time because they are probably trying to make bonus. So, if possible, I recommend you make an aggressive offer on March 29th! Good luck!
They dropped off my EXP this morning. Hoping they drop off of the other two tomorrow.