Several manufacturers make products which reduce odors....Renuzit, etc... I would buy several that have no odor of their own...as sweet smells are as offensive as bad ones.... I would simply surround myself with them...and put several more out in the office..
Since your boss is aware of the problem, he might give you the money from petty cash to cover the costs of doing this. They are usually about a dollar a piece.... having them all over the office would be a way to get rid of the smell without having to pinpoint or make an accusation of just what the source is...
This is also a good way to deal with the rude co-worker who drenches with cologne or perfume before coming to work. We have someone in our office who does this....it is simply sickening...
We have asked, in a memo to the general office, that due to allergies, asthma, etc....NO ONE wear scent to work.....we have also suggested that scent comes not only in perfume, but also scented fabric softeners, deodorants, etc..
You can bet that the people who continue to do this and cause an office-wide problem...are included in our list for people to be laid-off due to economic downturn. I am head of HR where I work...and many companies are using the economic downturn as a good time to get rid of people who will not adjust their behavior at work to being a thoughtful and effective member of our team..
It is an excellent way to solve a lot of problems in the workplace..and many companies are throwing in the names of people who didn't work out as well as one would like....with the people who are actually being terminated due to reduction in staff to meet economic circumstance.