As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(LOG 9486786) DIRTY SOCK SMELL ON T/O & CLIMB. DISSIPATED IN CRUISE CAME BACK ON DESENT AT APPROX 25000 FEET. SUSPECT SMELL DUE TO DUAL WATER WASHES. R/R BOTH RECIRC FILTERS REF B737 AMM 21-25. RAN BOTH ENGINES AT VARIOUS POWER SETTINGS FOR 20 MIN WITH NTF.