When your lease is up, not only do you have to find a new apartment, but you have to come up with the cash to facilitate the move. The cost of the first and last months' rent can be quite expensive, but you can make things simpler on yourself if you get your entire security deposit returned to you. The only way that you will get your full security deposit back after your lease is up is if your entire apartment is clean and in the same condition as when property was rented to you.
As a guest house owner, you want to offer your guests scrupulously clean facilities to enjoy during their stay with you. You wouldn't dream of putting dirty sheets on your beds, but how often do you have your mattresses professionally cleaned by a commercial cleaning company? Over time, a mattress accumulates particles of shed skin, sweat and dandruff that provide a great food source for dust mites. A population of dust mites in the mattress can lead to allergies and exacerbate existing breathing problems.