Inside of dishwasher was dirty after cycle, baskets had black in between the screen...took out all bottom and found dirty water, a couple of inches and slime in bottom...cleaned it all out and put it back together, two weeks later, same thing..cannot see it unless you take all the filter etc out of bottom...is a Fridgidaire dishwasher 950 series about 5 years old.

SOURCE: Inside of dishwasher not clean after running.

its a lime build up from the quality of your water.goto home depot/lowes or a supermarket and buy clr (calcium lime rust) remover.pour a cup in the dishwasher and run a full cycle.this should do the trick.

SOURCE: water in the dishwasher after the the cycle is complete

Two things to consider....clean water or dirty water?
Clean water usually indicates the fill valve is not shutting off all the way and the fill valve is "weeping" water in all the time = new fill valve time!!
Dirty water usually is not a dishwasher problem but more of a plumbing issue. Often the sink drain that carries the sinks water outside is not fast enough and some of this sink water is backing up into the drain hose and filling up the dishwasher through the drain hose. The drain from the sink to outside needs attention as this type of a problem indicates a slow house drain for that sink.
The dishwasher drain line should be clamped to the top underneath part of the counter before entering the sink drain plumbing, this may help the water from coming back inside the dishwasher.

SOURCE: Water pooling up in bottom of dishwasher

is there any way to run the cycle from the beginning and listen to hear if the machine is draining at all when the cycle starts do you hear the water spraying on the inside ? if not then you have several different possibilities....clogged drain line, pump impeller broken(sounds like running but no action), water just flowing back to washer the last one's an easy fix just loop the excess drain hose up like a reverse "p" trap on a kitchen sink drain this keeps the water from flowing back to the machine

SOURCE: WP ADG450, will just recycle the water and not use fresh water

I have had same problem and i cured it by refilling dishwasher salt which hadnt been done in a long time. hope it helps. S

SOURCE: Maytag dishwasher not draining fully

Try cleaning out the air gap.  The air gap is not part of the machine, and is located on your sink. If this becomes clogged, it may cause the machine to not drain properly.  Also, I know you said you checked the drain hose and cleaned as far as the filter and chopper blade, but have you checked the lower filter?  There is a filter located underneath the machine that should periodically be cleaned.  To check this, you need to access the machine from underneath by removing the bottom vanity cover. Hope that one of these helps!