We have learned to trust the OptiWash feature, which auto-adds time to cycle, presumably if sensors detect anything more than tap water (soap/soil) nearing rinse portion of wash. Machine is much quieter than our old, broken LG Tromm and comes standard with built-in WiFi for smartphone app notifications. Now we’re waiting for a deal on the matching dryer. Adding to our Samsung mini-split AC and “Showcase” refrigerator, I think Samsung has become the premiere home appliance company, with their attention to quality performance, noise reduction and WiFi connectivity at no extra charge.