When dealing with a major change of circumstances, spring cleaning your personal life gives you a good excuse to spring clean your home at the same time. Chances are that when your partner left, they took a fair amount of household stuff as well as their belongings, which can be a bit of a shock to the system if it was done in a relatively short space of time.
When I was first faced with the sight of the lounge after the filing cabinet, CD racks and so on were removed, and cupboards and drawers emptied, I was shocked and overwhelmed. I imagined this must be similar to the feelings of seeing your home the first time after a burglary. Even though you'd possibly nagged for certain items to be tidied away, the fact they've now vanished completely can be quite unsettling.
However, the good thing now is that you can actually get to all those neglected nooks and crannies in order to give them a damned good clean. I have to admit that all that dusting, hoovering, polishing and scrubbing was really quite cathartic and did help to take my mind off other things. It probably helped burn off a few extra calories too. Result!