If you have cleaned the heads and its working again then carry on using it. If it happens again then I would consider having it serviced. Putting the tape back in the camera is unlikely to cause any damage, but check first that the tape itself appears to be in good condition (visual check). e.g. tightly wound on the spools, no kinks or twists. If you need to get it serviced then it might be worth checking out these guys:
http://www.morrisrepairservices.com/
They also operate a collection and delivery service