I recently canned some strawberry jam using Sure-jell and strawberries from the grocery store (I don't remember what brand or where they were grown). I have done this every year for many years. The batch I made has an aftertaste that is VERY off-putting. I can't decide if it's a musty taste or like the pink pucks my grandma used to keep in her toilet. I had to spit it out! The interesting thing is that my sister also had the same reaction, but my husband, kids, parents, and siblings found nothing offensive about it! My brother did note that he felt it had a little bit of a sparkly sensation at the end. (No one became ill from eating it.) The jam tasted this way un-canned and canned. I considered that perhaps it was the Sure-jell because I had purchased it last year, but the expiration is still over a year away. The other thought is that its the variety of strawberry or something used to preserve it. Has anyone come across this issue before?