Mine broke when I rolled over in bed - POP! with a huge gush.... no trickling here! So some got on the matress and some on the carpet on the way to the loo, but we mopped it up with towels straight away and have had no problems with the matress or carpet or washing the towels!

As for corroding the framework in the ambo.... they must have been having you on surely? If it was that strong how can our bodies contain it..... Especially if it gets cleaned up and wiped down straight away.....

I think the main concerns are if there is meconium which I think is something that does ruin whatever it touches and that it does have a particular pungent smell which might linger in things that can't be washed easily.