You don’t even need to go that far. Take them down to 80%, and then slowly take them up to 100% again. Also remember that no balancing is done unless 1) current is actually flowing into the battery, 2) one or more cells actually measure higher than the others. In other words, all of the balancing happens somewhere above 90% SOC once one of the cells steps out of line… so you want to spend as much time as possible in that zone.
Alternatively… just run the battery normally. It gets better every day on its own. Start by setting a charge voltage that allows your highest cells to be between 3.6V and 3.7V. Then as you see the balance improve, move the charge voltage up slowly by 100mV every few days… and just use the system normally.