I use the batch sparge method and had a question regarding the sparge(s). When you add your sparge water, do you let it sit? or varlouf and drain right away? I have been letting it sit for 10-15 minutes for each sparge. I usually have to divide my sparge water in two because my mash tun is slightly too small to handle a single sparge. Is there any ill effects from letting it sit before draining? Is there an efficiency hit if I drain right away?