Dabad96

Hoping someone might be able to help me with this little problem. I have a 2009 Is250, as of lately the headlights have started to turn on randomly after the car has been turned off and with the switch on the "Off" position for the headlights. It happens more so when it rains, but it'll still do it even when it doesn't rain. Sometimes the lights will stay on after I get out and clicking the key fob twice doesn't turn it off so I have to disconnect the battery. Anyone know what it could possibly be?