Was chatting at work, and apparently some shower once every two days, some every day, some twice a day. One young bloke longest streak was 6 days he said, he realised it was too long when he got pimples on his back.
I'm interested in your longest streak, but more interested in ozbargainers habit.
Edit:
Perhaps interesting to note that Steve Jobs used to shower only once a day. He was so stinky that nobody wants to work with him, so he works at night.
On average one a day, often twice a day in summer (cause of being more sweaty), sometimes every two days in winter (just showering when my hair needs washing which is every two days).
Another interesting question would be when do you take your showers, I usually have mine before I go to bed (showers make me feel cosy, warm, and sleepy).