The more I think about it, the more I think that it’s very related to the thing that makes “For a Limited Time Only!” increase sales.
It sounds like you’d (the OP) had been used to cleaning when you had a chance, because you didn’t have much time to do it. So rather than a habit (something you would’ve continued to do at the same rate whether employed or not), cleaning had become a “Limited Time Only!” opportunity to grab. When that no longer applied, your normal impetus to clean was gone, so you didn’t do it.
Tourism is a great example of something similar that is common to a lot of people.
“Make hay while the sun shines” is a saying that refers to this principle of motivation - those who are in sales are keenly aware of it. If a salesperson gives the impression that the offer is only available for a limited time, customers are more likely to take it while it’s available.
It’s probably also related to how scarcity implies value. Value is rarely perceived at actual benefit - it has more to do with difficulty to obtain. We should all value air more highly than anything if it were otherwise. Without air, we’d die very very quickly… nothing else would be meaningful at all! But instead, air is so readily available and common that it does not get much value at all, people would often trade some air for something of much less intrinsic value, but more scarcity.