Sent it in for repair three times. 1-after swimming in the sea (moisture got into 2-after the repair, the clock began to rush by 30 minutes a day 3-after a year of use, I washed my hands under running cold water - the result was fogging. There is a Vostok watch - so they are really waterproof, and this (casio) is an error in the passport data . classification: do not get closer than 100 meters to sources of water (moisture)