If you have removed artificial nails and are experiencing moisture-related issues, such as the development of a fungal infection, it is important to keep the affected area dry and avoid reapplying nail polish. You can try using an over-the-counter antifungal product, such as tea tree oil, to disinfect the nail daily. If the issue persists or worsens, it is recommended to seek professional advice from a specialist like a podiatrist for a more effective treatment.