When you say it isn't cleaning, what exactly is your symptom? White residue left behind?
Anyway, to remove the filter: You remove upper and lower racks. Remove spray arm by holding the center hub with a pair of pliers, hold the spray arm with your hand and then turn the hub with your pliers. Remove the water delivery tube from the rear of the tub by releasing the clips on the rear and the top of the dishwasher. Use a small flat screwdriver to pry gently on the sides of the clips. Then you turn the delivery tube at the pump filter clockwise 1/6 of a turn right where you just took the spray arm off. You'll find four T-20 screws. The filter lifts off. Is your detergent being washed away when it dispenses?
http://c.searspartsdirect.com/lis_png/PLDM/K1004049-00006.pngFollow this link. Part number 1 is the filter. I'd highly suggest checking part number 6 by removing part 8 while you're down there. Make sure the chopper isn't broken. Sometimes the center hub breaks. The evidence will be the chopper perforated metal screen will be heavily clogged with debris.
I'm showing your status as offline. I will exit "Live Chat" because of this and change this to Q and A. You will receive an email that I replied to you. Since you're offline currently, I can't stay in live chat. Just reply to the Q and A mode and I'll see it. I'm online most evenings for a few hours and it's getting late where I am right now. I hope to help you soon.
You post them using the paper clip icon in THIS text box. When you reply to me, there is a paper clip icon in the tool bar above the text box. I don't know what email you sent them to, but we can't correspond via email. It's against Just Answer's policy. The only correspondence between an expert and a customer can be either through live chat or Q and A like this. I'm online for a little bit. It's nearly midnight EST.
Watch this video. http://www.youtube.com/watch?v=iRCCrEwrst8
It might help you.
I did post a link to a video.. it's about 10 minutes long, it's a good visual aid. Yours doesn't have clips like the one in the video (as that one is a stainless tank) but the screws are in place of those clips which release the tube. It's gonna be really helpful to you if you view it.
Here it is again: http://www.youtube.com/watch?v=iRCCrEwrst8
Yeah, I never got your response until today, so I'm sorry. I was online over the weekend though and your reply did not appear.
The power scrubber thing just pops off though. Once that's away, and you can remove those two screws on the delivery tube, you'll be ok. Don't lose the plastic sleeve on the center threaded hub once you get it off. It's thin and clear.
Sorry to hear your husband is on dialysis. I know that's gotta be tough. My mother just went through breast cancer treatment, so I'm familiar with family medical stress. Just stay in touch, reply back here and I'll get back to you as soon as I can. I DO work M - F until around 5 PM EST, so I don't come on until the evening FYI. Talk to you later.