I'm canning plums by water bath method. The problem is even though I stew the plums in syrup a few minutes first and then scoop them into mason jars and top with more hot syrup after 30 minutes of the hot water bath, all the fruit floats to the top of the jar.
Put spices in cloth bag and boil in the water mixed with vinegar and sugar. Peel peaches and add to liquid. Cook until tender. Put in jars and pour hot syrup over and seal.
I recently canned tomatoes using the water bath method and realize now that I didn't boil them long enough, only 10 minutes. Can I put them back in the water bath and redo them. I used an old canning book that called for only 10 minutes. I did pack them hot in sterilized jars and and the lids are sealed. Help!