In order to conduct a reset on your Garmin 225 then first of all switch it off for that press and hold the light then click “yes” as you see the prompt then further press and hold the start or stop button and Lap /reset button then as you hear the first beep sound then leave the start/ stop button then as you hear the second beep then leave the reset button then release reset button further release the light button. This is the best way to conduct a reset on the watch and is also the easiest if performed correctly and if still, you have any problem regarding for Garmin's products you must visit the link https:///2R4Bi0W