I think the frequent showering and new clothes indicate this person is aware and it might be easier to suggest a visit to the doctor to see if there is any infection causing the problem. How you broach it depends on your relationship with this person.
Many years ago I taught a small child who smelt of urine constantly despite being spotlessly clean with clean clothes every day. Some years later she had an operation for adenoids, and during surgery a small bead was discovered embedded in a nasal cavity which had festered during the years and caused the odour. Once removed, end of problem.
It had to come; Farage bringing ICE advisor to UK
Pressure - regarding the lead up to the D Day Landings



