ant-mac
Member: Rank 9
Possibly...I think it's a perfectly logical explanation of why he never showered.
But that doesn't explain why Sarah Jane didn't complain about the smell, or why the Doctor failed to comment on how lucky he was to have a respiratory bypass.
Personally, I think he did shower. However, he didn't use an old-fashioned water shower, but instead used a sonic shower.
Or some other equally advanced Kraal technological device for keeping clean.