Is there such a thing as too much hand washing?  

Yes, I agree with your opinion, I always think the ladies are too much clean.

There is such thing as too much hand washing. It's usually related to an OCD. There are people with different kinds of OCD's. Using to much Lysol could also lead to the reason she is sick so often. I keep my hands clean and use Lysol in moderation. I'm not sick that often but when I get sick I get really bad.

I can somewhat sympathize because I am phobic of some germs, only ones that cause stomach bugs since I am emetophobic. However here is why she keeps getting sick. If you overdo it with the cleaning and spraying, it will get rid of ALL germs that also includes the good ones and you need to be exposed to SOME bad to become immune to it. Last winter, I did something similar with my kids. I put something called invisible gloves on them which is a cream that keeps your hands clean for 6 hours. I also sanitized their hands for reassurance and sprayed their toys all the time. Well they still managed to get a bug that made them puke. This time, I am not doing that other than sanitizing their hands and don't want to speak too soon but they both have had nothing other than colds and some sinus infections. So if you get rid of ALL germs, it's going to lower your resistance and you will get sick easily too. Going towards both extremes will end up in the same result, ironically. You clean up once before they eat, that will be enough to stop the bad germs from attacking you. Usually anyway... and besides if you wash your hands too much it will dry out your hands beyond belief and in the middle of winter that is a bad thing.

I have never gone so far as to have Lysol at my desk, but I DO open the restroom door with a paper towel. I also use one to turn the faucet off when Im done washing my hands. Pretty much everyone who turns the faucet on has dirty hands.

This lasy seems to forget that many germs are from handshakes and being near sick people.

LOL The reason she is getting sick is because she is making it so her body is not immune to the germs. you are in fact supposed to use a paper towel to open the door and turn off the taps in public places LOL. It's is taught in the food safe course. But she is going a little over board lol

Some people have this obsession and they keep washing hands.My dermatologist said that too much of washing dries the natural oils on your skin and the skin tends to get dry and chap.