The moths won't actually harm the seed but the webs are pretty annoying. You can wash them with plain water if you want to, it won't harm the seed. You can sprout them if you want to as well, but personally I'd go for less than five days. There's less risk of bacteria and mold with a shorter sprouting period. Here's our article on sprouting:
http://www.littlefeatheredbuddies.com/i ... uting.html