Himalayan salt is Hydrophilic and absorbs moisture from air. This more likely to be happened in humid conditions. As salt lamps are natural air purifier & this is the way salt lamps work. To stop salt lamps weeping one has to look after these lamps.
Following are basic steps can be taken to stop salt lamps weeping, sweating or also called water leaking.
1. Keep on 24/7 - Bulb heat will keep salt rocks dry, this is highly recommended method as you will get real benefits of Himalayan salt lamps and maximum life span of salt
2. Cover the lamp if not in use
3. Use a dish to protect your furniture or any wooden base etc.
4. Keep your lamp away from humidity areas