If the bulb appears in the app but won’t respond, start by power-cycling it at the wall switch. Wait about a minute, then try again in the App. If that doesn’t work, check if the bulb still functions by quickly toggling the power: turn it on for about a second, then off, then on again. This should trigger Evening Mode. If it lights up, try another power cycle to restore full App control. If the issue persists, contact OIO Support: 855-OIO-BULB or OIOcare@korrus.com.