The other day I had to move the washing machine. Unfortunately, the other half used the machine, after it had been moved, but without first putting it through on a wash cycle.
The water slopping about in the machine during the move dislodged tons of s*it and crap.
The first wash after the move consisted of white shirts. They have all come out covered in blue fluffy bits. They are a git to remove.
If anyone moves a washing machine, I would run it through on a cycle before it is used again for the first time.
Graham