How drooly is Axel? We had this with some electronic toys DS had: his drool managed to set them off at 3am. Wunderbar. It was a ride-on too, as the battery thingy was in the right place to collect all the drool.

A year after we gave up on having batteries in it, I put some new ones in. Same thing happened. It is now battery-free (and in the loft).