Sudden Flower Collapse After Short Trip: Root Rot Suspected

Min's Phalaenopsis flowers closed up after a 4-day trip despite pre-watering. Expert: unknown mix condition at purchase. Post-flowering is good repotting time. Unpot, rinse roots—collapsed/stringy = rot, remove them. Feeding with bad roots useless. Repot in plastic pot with drainage, soaked fir bark mix. Wait 1+ week to water. No standing water. If roots healthy, cause may be temp drop or dry mix. Repotting gives fresh start for new growth cycle; new buds possible.