To clean your washing machine?

We have a top loader and i normally do a full extra dirty HOT cycle with WHITE VINEGAR?

I find as we do a LOT of very dirty washing (DP's a carpenter and also LOVES riding the go-karts and motorbikes in the mud ) our machine gets filthy very quickly.
Also it seems the washing liquid we use collects in the little filter thing in the middle and sometimes i get like stains on some of our clothes!

I use color catchers for DD's clothes to save on doing small loads for her and her clothes GENERALLY come out fine but my darks etc always seems to get white powdery marks on them even though i use liquid... WTF?

Any tips would be great, wanna save my washing.. :-)

Vinegar wash is on as we speak, what else can i try?