WHY won't my dishwasher very well work anymore?!? I have a Kenmore Ultra Wash, and it come with the house....

I have a Kenmore Ultra Wash, and it come with the house. It is at lowest 3 years old. It used to bathe so well, and immediately food stays stuck and the glasses are streaky. I full up the reservoir with Jet Dry going on for 6 months ago and try to refill it every month, but it is still full. I have an idea that something is stuck somewhere. Any ideas?
The wispy bulb on my garage door starter...
Answers:    1st- use the spray dry hang on picnic basket one. then capture Tang orange powder mix and put a cupful into vacate d/w and run full cycle. This will clean your d/w out of adjectives built up residue. Also will whiten tub up.
2nd make sure your drain hose below sink is looped up above where it connects to sink tailpeice.
3rd- Make sure river going to unit is no hotter than 160 or it will overheat things on to things.
Re: wall a/c and perkiness use: Does a...
Have you been doing regular cleaning, close to taking all the parts at the bottom apart and cleaning. You will be shocked and disgusted!!!Other than that check out Kenmore's website to check on troubleshooting, merely have your craft and model.