It is not advisable to leave the cooker on for a long time without supervision, not so much because of the appliances, but rather due to an error in the power supply or environmental conditions, etc.
The kitchen must be cleaned after each service. It is also advisable to clean stainless steel surfaces daily with warm water and detergent. Rinse in plenty of clean water and dry carefully.
For our 750 range, the approximate diameter is 35 mm (30 litres approximately) and up to 40 cm for our ninety pans range.
They can all be painted, on the upper and lower parts, as well as the sides.