There are basically two different types of machines you can choose from to clean your tile & grout. Both of them are easy to use. You can use a steam cleaner, or a pressure washer.
A steam cleaner does more than just clean your grout; it also kills germs, mites, and bacteria. However, you need to be sure that you get a good steam cleaner to get the job done right. You should be using a steam cleaner that rates at 6 bars or better. A steam cleaner pressurizes the steam making it 180o C which is much hotter than waters normal boiling point of 100o C.
When steam has reached that point (of 180o C) it is called vaporized steam. It has about four to five percent of the moisture that regular steam has. This is a great advantage in grout cleaning because there is no water mess to clean up after cleaning the grout. A steam cleaner is a very effective tool to clean grout with. There are many professionals who provide this service, or you can rent the machine at a local rental shop and do the job yourself. Be sure though, that once the grout has been steam cleaned to apply grout sealer to keep the grout clean & maintained for much longer.
The other machine you can use for grout cleaning is a pressure washer. The greatest drawback to using a pressure washer over a steam cleaner is that a pressure washer uses a lot more water, so the clean up (after the cleaning) can take a while longer. As a result of that, you also will probably not be able to use it in all areas of your house. A pressure washer works great outside, and in baths & showers. You could even conceivably use it on bathroom floors (with a lot of care taken). However if you have tile flooring in any other areas of your house or tile in the kitchen, it would probably not be the best tool to use.
The advantage to using a pressure washer is that it is much faster to use than a steam cleaner for large areas, and it is easier to use vertically (like bath & shower walls). However, you have to be careful that you do not turn the pressure up too high so you don't damage the grout.
As with a steam cleaner, you can rent a pressure washer, or hire a professional to do the grout cleaning for you. They are cheap to rent, usually - and you could even buy a good quality one for 0 new. Note: When you are looking to rent or buy a pressure washer, PSI alone does not determine the speed. Talk to a salesperson to be sure you get the right pressure washer for your job.
