Originally Posted by Torres
I started having a go at this last night with warm water and washing detergent. Some of it comes off but its difficult to shift the ingrained dirt particularly from awkward areas such as the padded straps, corners, material around the zips etc.
I think those areas really need a long soak with detergent and then another attempt.
This really needs a stronger cleaning agent.
Are those parts white? As long as it is poly/fabric you could use bleach.
If it's another color I believe there are fabric stain removers that would work well on poly/fabric colors.