Hi Jutemill. Welcome to Mrs Clean!
These hand held steamers will do a great job disinfecting if used properly.
You can do research on the web for reviews as to what users think of these steamers. I found mostly positive reviews. Here is a link to one of those sites, although there are many other good review sites out there:
http://www.burningvoid.com/weblog/revie ... eam_1.html
Also, here's the web page that contains instructions for the "Hot Shot" and what it will and won't do at
http://www.eureka.com/service/manuals/70397.pdf
There was not any information provided by the manufacturer on how long you would need to apply steam, but I found a university site that stated
7-10 seconds of steam will disinfect a surface.
One reviewer stated that it didn't clean tile as promised. I usually clean my bathroom after a shower to "pre-steam" the tile. This would probably help with this issue.
You can see other tips at
http://www.mrscleannw.com/tips/shower-cleaning.html As mentioned above, you should check out the manufacturer's recommendations on what surfaces each type of steamer may be used on.