There is no universal answer. Some current robots advertise multi-day or weekly scheduling, while other manuals tell owners to remove the unit after each cycle. Use the exact model-year manual, not advice for a similarly named cleaner.
Read the model-specific rule
There is no universal answer. Some current robots advertise multi-day or weekly scheduling, while other manuals tell owners to remove the unit after each cycle. Use the exact model-year manual, not advice for a similarly named cleaner.
Chemical exposure
Remove the robot before shock treatment and whenever water chemistry sits outside the manufacturer's operating limits. Extended exposure to concentrated chlorine, salt or unbalanced pH can affect seals, brushes and plastics.
Battery and charging
Cordless robots generally need to be removed and fully dried before charging. Never connect a wet charging port, and stop using a charger or robot covered by a recall or showing heat, swelling or damage.
A safer routine
Unless the manual explicitly supports in-water scheduling, remove the robot when the cycle ends, drain it, rinse the filter and store it shaded. That routine also makes it easier to spot damage before the next run.
Your next step
Shortlist the models that fit your pool, then compare exact model-year specifications and current manufacturer terms before ordering.