I'm sorry to hear about this in Harvey. I understand the wetness; I lived on the Big Island for 3 years. You appear to be describing a lip fold dermatitis which describes a superficial bacterial infection common within skin folds. The presence of green is pathognomonic (particularly indicative) of a bacterium called Pseudomonas which can be very difficult to cure. The following is a synopsis of how to care for a lip fold dermatitis but if you didn't see a positive change, it would be prudent to culture the affected skin to see which bacteria are present.
1) Cleansing wipes (i.e., alcohol-free acne pads, baby wipes, chlorhexidine-containing pledgets, other antimicrobial wipes) used every 12-72 hours work very well.
2) Alternatively, routine topical therapy can be used to control the skin problem. The affected area should be cleaned every 1-3 days as needed with an antibacterial shampoo that contains chlorhexidine, benzoyl peroxide, or ethyl lactate. These shampoos can be found over the counter in pet/feed stores, online, or at Harvey's vet hospital.
3) Topical application of an antibiotic ointment, solution, or spray every 24 hours for the first 5-7 days of therapy may be helpful. The safe prescription mupirocin ointment is available through Harvey's vet and should be considered.
5) Surgical excision of excess skin folds is usually curative. The prognosis is good but lifelong topical maintenance therapy may be needed if surgical correction isn't performed.
Please respond with further questions or concerns if you wish.