Home & Garden
Just to add, if you are a Belgian ta payer, that €7.50 is reduced further (in your tax return, not directly) to something like €5.50 per hour.
Resist paying anyone to clean your house on a regular basis, except through titres-services. It's illegal to pay anyone cash in hand, if you don't want to use titres-services, then to legally do it will cost much more as you'll have to employ them directly and arrange social security payment and tax.
There are also one-off cleaners which you pay more for, such as for house exit cleaning which will present you for a bill like any other service, all should be legal.