Get a Fastrack, Fastrack tray, and a container large enough to fit the Fastrack (and tall enough to cover the bottles).
1) Fill Fastrack with bottles, add tray and flip over (bottles upright).
2) Put into container, fill with cleaner.
3) Remove and flip to drain, rinse with sink spray nozzle and drain again.
4) Place back in container (bottles upright), fill with sanitizer.
5) Remove, drain upside down until ready to bottle.