Have you contacted Scalextric's helpline? Have they replaced parts yet? Definately sounds like you have a faulty set
saddly also, the answer seems to be yes as to Carrera. People from all three systems have ended up with stuff which doesn't work, requiring varying amounts of negotiations with their dealers to sort it out. A problem with cutting (bleeding) edge technology and early adopting generally

saddly also, the answer seems to be yes as to Carrera. People from all three systems have ended up with stuff which doesn't work, requiring varying amounts of negotiations with their dealers to sort it out. A problem with cutting (bleeding) edge technology and early adopting generally