I recently acquired this biscuit tin full of Lego on a treasure hunting expedition. It was tucked away in a cupboard, so hot tip people it pays to look in cupboards when out about and thrifting.......you never know what might be there. I nabbed it immediately knowing both the Big V and Master V would be utterly thrilled. Only trouble was that the Lego was rather grubby and dusty, so I went in search of some tips and hints for cleaning Lego. I then formulated my own plan of attack from various things I read.
So very easily and quiet simply, I put a scoop of laundry powder in the laundry basin and let it dissolve in warm water and let the Lego have a good old bath. I agitated it a bit to help loosen any dirt stuck on the underside on the bricks.
After a good old soak, I took an old pillow case and placed it all in there, ensuring I tied the pillowcase with a big tight knot, because it was going in the washing machine. With another scoop of powder I let the Lego run a cycle on a cool wash. When the load was done I placed the Lego in a strainer/colander to get rid of excess water being held and pooled in bricks. Then I was done and had cleaner, brighter Lego bricks, sure some bricks may still require extra attention with a tooth brush and cleaner for stubborn grime. But otherwise this was a great way to freshen up old Lego and to be honest I haven't bothered with a toothbrush and cleaner with stubborn bricks. Besides there is little you can do about permanent marker on them without destroying the block, time and wear are best for that I think.