Hi folks, I've been making loaf bread at home for about 6 months now and I need a little help on a problem that happens every so often. after I shape, pan and start to proof the loaf, the top seems to stretch and tear. no on all of the loaves in one batch but only on a few. what could be the problem? too wet or too dry, not mixed long enough or too long, improper proofing? please help me.