I set my carboys on their sides on the counter next to the sink and use the sprayer to rinse them, dumping the gunk into the sink. When all of the easily removed gunk is out, I set them upright and fill them with water and allow them to set overnight (or more) to loosen everything up. I end up draining them with my racking cane then use the sprayer and a carboy brush to clean the stuff off that wouldn't come out the night before. I then rinse them several times with hot water, then once with One Step, allow them to set for a few minutes to allow the cleanser to work, then rinse them several times with water and set them in the carboy drainer to dry.
In prep for using them again, I rinse several times with hot water using the spray attachment, then hit them with the One Step again, allowing it a few minutes to work, then rinse a few times with full hot water...
I do the same when I prep bottles for use, filling them with water overnight, then rinsing and scrubbing, followed by One Step, followed by more risning with hot water. I put them on the drying tree and pull them off within s few hours when ready to bottle. If the bottles have set in a box at all or hung on the tree for more than a day or so, I redo the rinse and sterilize part...
People with sensitive/educated taste can taste the cleanser in a batch if you fail to rinse it.