you don't want to scrub metal wand lips with suction on ceramic tile.  get a 
glide if you want to hack it out with a wand.  If not get you a hard surface tool made for it. 
You can do a good job with a wand though honestly.  Get you a good hard surface cleaner, alkaline, and acid, and a brush.  You need to make sure you test spots first to see if you do any damage especially with an alkaline cleaner.  I also suggest you do a bit of research before you take the plunge.  But seriously your wand can do an adequate job rinsing for the time being....and as you do a few save up for a hard surface tool.  Also you should get at least .50 a ft so don't do it too cheap or you wont be able to afford new equipment and all that good stuff.