Cleaning pop up backdrops

[Chaz Photos]

I have a two sided pop up back ground with trains one white and one black BUT how can you clean them? very large and with the spring inside which I am guessing is metal.
Any advice.

 

[Chaz Photos]

no one?

or is it that no one get to read this as its not on main opening board when its new>?

 

[Andytc]

I just use glad wipes.

 

[Andytc]

Flash wipes

 

[Chaz Photos]

For cloth?