I can totally relate to what has been said here. I was raised in a very messy/dirty house (once I nearly died of embarrassment when my friend said to me at school, you sometimes smell like your house - I knew exactly what she meant!). I suffer from clutter blindness sometimes, and other times just feel completely overwhelmed by the clutter, and just have no idea where to start
I discovered something about myself once, that when I clean the bathroom handbasin, so it's really nice, I notice it and keep it that way. Once someone has come in and really dirtied it up, I kind of accept it as normal and let it stay that way. Seems I notice cleanness and not dirtiness.