I should add - use very dim light like a far corner of you veg room while you are waiting for the cuttings to root - too much light is too stressful for them . Blue light is the best for getting them to root .

I use one of these turned upside down .
Walmart.com : 95-Quart Pink Storage Bin, Set of 5 : College 08
These are much more durable than a plastic high-top horticulture dome that snaps on the trays . You can sit this in a closet with a small blue light sitting right on it or you can put it in a corner of your veg room as it will help break up the light since it isn't perfectly clear .

I just bought stuff today to build a mister for rooting but I have used those plastic storage bins forever with great results .

edit - the one in the link is really expensive and is a set of them . I just wanted to show you what I was talking about . You can get them in dollar stores , Walmart , or grocery stores for under $10 a pop and they can be used forever . Make sure you get one at least a foot deep but aim for 18" or more .