Kajoda929
Songster
I've found shavings to be the simplest to keep clean since they're absorbent and stay clean for a bit longer than say, paper towels, because they get stirred up and dirt/food/droppings get mixed in. Shavings can also be spot cleaned and aren't slippery. The one issue with them is that the chicks kick them around into the food and water, so that requires some maintenance.
Paper towels are a pain because you have to use alot to keep it clean, in my experience, and that's much more expensive than wood shavings.
Since newspaper isn't very absorbent it would get nasty and like you said slippery - I wouldn't want to deal with that.
I don't know about sand, it doesn't sound too dirty but I feel like it could get too hot if you're using a heat lamp. I know some people use it though.
I used some random bits of wood and built a little ledge for the food and water because of the bedding issue...Was also thinking about getting some Velcro tabs to keep them from knocking the water over when there's less in it(since they're a bit bigger now and jump on it) to hold it steadier...They don't kick the bedding in the water anymore and this crude block isn't tall
I use Aspen shavings btw. I ordered this on Amazon for extremely cheap, but aside from the food and water aspect, it works great!