there def no white tissue inside the washing machine

[biglips]

So why does, esp on dark clothes, looks like dusts?? Yesterday i cleaned it out using the limescale tabs and also the filter.....it was dirty but still the same??

Is it undissolved washing powder? Maybe you are using too much and the machine temperature isn't dissolving it all, or the machine just isn't reaching temperature, or are you perhaps overfilling the machine so the powder in the drum isn't having enough contact with the water for it to dissolve?

Try switching to gel for coloureds - been doing this for a month or two after reading on here that coloured should be gel and whites with powder as it has bleach in it...

give it a hot hot hot wash with no powder or liquid, but a cup of washing soda crystals. There may be a residue of old soap in the machine. If the water goes grey and foams up, that's the old soap dissolving. Do it again until it stays clean. Cool washes are not good for dissolving detergent so more likely to leave residue.

It is also possible that a white sock or something has escaped between the drum and tub. In this case you would get shredded sock fibres in the filter.