Balm Balm director Glenda Taylor reveals the progress made in husband Haydn's natural skin care experiment in a post on the company blog.

Last week, she wrote of his developing cold sore - and how it might not look good for a representative of a natural skin care brand to attend client meetings with such an imperfection.

Ms Taylor explained that, while she was not claiming any healing properties associated with tea tree oil, Mr Taylor was trying their own organic tea tree oil in an attempt to combat the progress of the blemish.

Now she has issued an update on his progress, writing: "The cold sore is no more! It's official - tea tree is wonderful."

She suggests that an effective aftercare routine would see Mr Taylor continue treatment using tea tree on a daily basis.

However, with only a minor red mark remaining, Ms Taylor concedes that his status as "a bit of a bloke" could mean that he lets the treatment slide.