I’ve use rock wool cubes and cling film in a pinch.
It works fine but the clingfilm is nightmare to work with,
the cloning balls are really convenient though tbh I don’t see them as a cloning device 
I’ve use rock wool cubes and cling film in a pinch.
It works fine but the clingfilm is nightmare to work with,
the cloning balls are really convenient though tbh I don’t see them as a cloning device 