Is this a hotpoint washer? If so can you post the full model number please.
Also does it seem to go through the cycle ok?
Are you getting any flashing lights from the front panel?
Ok if you peel the door seal back a bit do you see any muck in there?
Is there a musty smell inside the machine?
Ok so you arent getting any error codes or flashing lights.
So whats happening here now?
Is it filling and draining ok?
Will it spin fine?
Is it just leavin soap still on the clothes?
Ok sounds like it has a bulid up of scum all inside the drum.
You say you do a boil wash on it. How often do you do this?
Ok this is going to take a bit to get rid of it.
What you need to do is 1 boil wash either every day or every other day for a week.
Run it empty and with a bit of soap powder.
Then do 1 once a week for about a month. Then do it once a month then to keep on top of it. It will take a bit to get rid of it all but it will go.