1999 Tiger Idle Issue

Hi,
I have a 1999 Tiger 885i. It has been running fine but now, after running for a bit, the idle creeps up to about 2500. When I stop and restart it is ok for a while again, then the same thing happens. I think I need to get Tune ECU and do a TPS reset but I don't have an android tablet or a OBD reader so I would be starting from scratch. Is there something else I can check in the mean time? I did have the tank off and the hoses look OK but I was told it might be the intakes from the airbox. I am hoping I don't need to take the tanks off again, I am afraid to break a plastic connector.