diff --git a/devicetypes/smartthings/smartpower-outlet.src/smartpower-outlet.groovy b/devicetypes/smartthings/smartpower-outlet.src/smartpower-outlet.groovy
index 685e041..d96dd77 100644
--- a/devicetypes/smartthings/smartpower-outlet.src/smartpower-outlet.groovy
+++ b/devicetypes/smartthings/smartpower-outlet.src/smartpower-outlet.groovy
@@ -143,7 +143,7 @@ def refresh() {
 def configure() {
 	// Device-Watch allows 3 check-in misses from device (plus 1 min lag time)
 	// enrolls with default periodic reporting until newer 5 min interval is confirmed
-	sendEvent(name: "checkInterval", value: 3 * 60 * 60 + 1 * 60, displayed: false, data: [protocol: "zigbee", hubHardwareId: device.hub.hardwareID])
+	sendEvent(name: "checkInterval", value: 3 * 10 * 60 + 1 * 60, displayed: false, data: [protocol: "zigbee", hubHardwareId: device.hub.hardwareID])
 
 	// OnOff minReportTime 0 seconds, maxReportTime 5 min. Reporting interval if no activity
 	refresh() + zigbee.onOffConfig(0, 300) + powerConfig()
diff --git a/devicetypes/smartthings/zigbee-dimmer.src/zigbee-dimmer.groovy b/devicetypes/smartthings/zigbee-dimmer.src/zigbee-dimmer.groovy
index 79c460f..ef17d94 100644
--- a/devicetypes/smartthings/zigbee-dimmer.src/zigbee-dimmer.groovy
+++ b/devicetypes/smartthings/zigbee-dimmer.src/zigbee-dimmer.groovy
@@ -104,7 +104,7 @@ def configure() {
     log.debug "Configuring Reporting and Bindings."
     // Device-Watch allows 3 check-in misses from device (plus 1 min lag time)
     // enrolls with default periodic reporting until newer 5 min interval is confirmed
-    sendEvent(name: "checkInterval", value: 3 * 60 * 60 + 1 * 60, displayed: false, data: [protocol: "zigbee", hubHardwareId: device.hub.hardwareID])
+    sendEvent(name: "checkInterval", value: 3 * 10 * 60 + 1 * 60, displayed: false, data: [protocol: "zigbee", hubHardwareId: device.hub.hardwareID])
 
     // OnOff minReportTime 0 seconds, maxReportTime 5 min. Reporting interval if no activity
     zigbee.onOffRefresh() + zigbee.levelRefresh() + zigbee.onOffConfig(0, 300) + zigbee.levelConfig()
diff --git a/devicetypes/smartthings/zigbee-rgbw-bulb.src/zigbee-rgbw-bulb.groovy b/devicetypes/smartthings/zigbee-rgbw-bulb.src/zigbee-rgbw-bulb.groovy
index 1e8102b..aa4defb 100644
--- a/devicetypes/smartthings/zigbee-rgbw-bulb.src/zigbee-rgbw-bulb.groovy
+++ b/devicetypes/smartthings/zigbee-rgbw-bulb.src/zigbee-rgbw-bulb.groovy
@@ -145,7 +145,7 @@ def configure() {
     log.debug "Configuring Reporting and Bindings."
     // Device-Watch allows 3 check-in misses from device (plus 1 min lag time)
     // enrolls with default periodic reporting until newer 5 min interval is confirmed
-    sendEvent(name: "checkInterval", value: 3 * 60 * 60 + 1 * 60, displayed: false, data: [protocol: "zigbee", hubHardwareId: device.hub.hardwareID])
+    sendEvent(name: "checkInterval", value: 3 * 10 * 60 + 1 * 60, displayed: false, data: [protocol: "zigbee", hubHardwareId: device.hub.hardwareID])
 
     // OnOff minReportTime 0 seconds, maxReportTime 5 min. Reporting interval if no activity
     refresh()
diff --git a/devicetypes/smartthings/zigbee-white-color-temperature-bulb.src/zigbee-white-color-temperature-bulb.groovy b/devicetypes/smartthings/zigbee-white-color-temperature-bulb.src/zigbee-white-color-temperature-bulb.groovy
index 9283628..15a83f6 100644
--- a/devicetypes/smartthings/zigbee-white-color-temperature-bulb.src/zigbee-white-color-temperature-bulb.groovy
+++ b/devicetypes/smartthings/zigbee-white-color-temperature-bulb.src/zigbee-white-color-temperature-bulb.groovy
@@ -128,7 +128,7 @@ def configure() {
     log.debug "Configuring Reporting and Bindings."
     // Device-Watch allows 3 check-in misses from device (plus 1 min lag time)
     // enrolls with default periodic reporting until newer 5 min interval is confirmed
-    sendEvent(name: "checkInterval", value: 3 * 60 * 60 + 1 * 60, displayed: false, data: [protocol: "zigbee", hubHardwareId: device.hub.hardwareID])
+    sendEvent(name: "checkInterval", value: 3 * 10 * 60 + 1 * 60, displayed: false, data: [protocol: "zigbee", hubHardwareId: device.hub.hardwareID])
 
     // OnOff minReportTime 0 seconds, maxReportTime 5 min. Reporting interval if no activity
     refresh()
diff --git a/smartapps/smartthings/hue-connect.src/hue-connect.groovy b/smartapps/smartthings/hue-connect.src/hue-connect.groovy
index d793cf4..d39d451 100644
--- a/smartapps/smartthings/hue-connect.src/hue-connect.groovy
+++ b/smartapps/smartthings/hue-connect.src/hue-connect.groovy
@@ -37,7 +37,10 @@ preferences {
 
 def mainPage() {
 	def bridges = bridgesDiscovered()
-	if (state.username && bridges) {
+
+	if (state.refreshUsernameNeeded) {
+		return bridgeLinking()
+	} else if (state.username && bridges) {
 		return bulbDiscovery()
 	} else {
 		return bridgeDiscovery()
@@ -102,13 +105,22 @@ def bridgeLinking() {
 
 	def nextPage = ""
 	def title = "Linking with your Hue"
-    def paragraphText
+	def paragraphText
 	if (selectedHue) {
+		if (state.refreshUsernameNeeded) {
+			paragraphText = "The current Hue username is invalid.\n\nPlease press the button on your Hue Bridge to re-link. "
+		} else {
 		paragraphText = "Press the button on your Hue Bridge to setup a link. "
-    } else {
-    	paragraphText = "You haven't selected a Hue Bridge, please Press \"Done\" and select one before clicking next."
-    }
+		}
+	} else {
+		paragraphText = "You haven't selected a Hue Bridge, please Press \"Done\" and select one before clicking next."
+	}
 	if (state.username) { //if discovery worked
+		if (state.refreshUsernameNeeded) {
+			state.refreshUsernameNeeded = false
+			// Issue one poll with new username to cancel local polling with old username
+			poll()
+		}
 		nextPage = "bulbDiscovery"
 		title = "Success!"
 		paragraphText = "Linking to your hub was a success! Please click 'Next'!"
@@ -915,8 +927,15 @@ private handleCommandResponse(body) {
 					updates[childDeviceNetworkId]."$eventType" = v
 				}
 			}
-		} else if (payload.error) {
-			log.warn "Error returned from Hue bridge error = ${body?.error}"
+		} else if (payload?.error) {
+			log.warn "Error returned from Hue bridge, error = ${payload?.error}"
+			// Check for unauthorized user
+			if (payload?.error?.type?.value == 1) {
+				log.error "Hue username is not valid"
+				state.refreshUsernameNeeded = true
+				state.username = null
+			}
+			return []
 		}
 	}