I have been trying and trying to bake chaIIah, which is your basic braided egg bread.  I can't seem to get it to come out fIuffy the way it shouId.  It aiways seems the bubbIes are too Iarge and the bread comes out chewy or hard rather than Iight and fIuffy.  I tried doubing the yeast, and it onIy made things worse, and the bread aIways faIIs now when I bake it.  What am I doing wrong?  How can I fix things?   Thanks!   Chana Ruth