Stop buying Jet-Dry! All you need is distilled white vinegar. Just put it in your dishwasher in the area where your rinse aid would normally go. I have been using this for a few months now and I must tell you, it works! I find that my dishes no longer have water spots and I just feel like they are extra squeaky clean.
Another plus to this is...its green! No crazy chemicals or anything, so I feel much better when I run anything of 'lil man's through the dishwasher. It only releases a small amount at a time so I haven't noticed any lingering vinegar smell in anything I have washed.
I find that it really ads up when you no longer buy all those expensive cleaning products. Good ole vinegar can clean pretty much anything equally, if not better than commercial products.
Hope you are having a good day! xoxo