If you can afford to move on to your next place and only then sell your condo then that may be the best option, because you (or your broker) can get a company to stage the place and present it much better than your current furniture potentially, and the house will be 100% clean. It's very possible that you'll get a better price, and you won't have any of this stress.
If you can't afford to carry both mortgages, then moving out for a week or two might also be an option. If you're in a hot market, have a good broker, and are reasonable with your asking price then a week or two might be enough (even a few days might be enough depending on the market). Go on vacation, rent a house nearby, etc. The small cost will certainly be worthwhile as you can clean your place really well before you leave and then it'll show much better. You might spend a couple thousand on going away but you might gain much more than that on the sale.
If neither of those work for you then as others said the few hours of cleaning is worthwhile. Think about it this way- if you clean even 20 times for an hour each before you get a sale you might make 10 or 20 thousand more because it showed well (though admittedly you'll never know). If your time is worth much more than $500-1000/hr then obviously that's a bad deal, but if your time is worth less than that then just look at it as a worthwhile part of the process and don't kvetch about it so much