I highly recommend something like the infuser below for brewing tea. It is easy to clean and works well with all teas.
http://shop.tgtea.com/store/product/...n-Mug-Infuser/
http://shop.tgtea.com/store/product/...eramic-Filter/
http://shop.tgtea.com/store/product/...ent-Teafilter/
I use the last infuser because it is less expensive but the others look nicer on a desk.