Here we have some frequently asked questions:
1) How long do they last?
We recommend using between 2-3 teaspoons of Scented Crystals for an average size burner. This should last a minimum of 8-10 hours per use. 
2) Are Corkee Scented Crystals cost effective?
Let's compare to a well known brand of wax tartlets. For £1.79, one wax tartlet offers 8 hours of fragrance. Using our guidelines, however, one small jar offers 2-3 uses, each providing 8-10 hours of fragrance. That's up to 30 hours of fragrance for only £1.70! 
3) Do I need to add water or oil?
Absolutely nothing. Simply pop them in the top of the burner or warmer. Light a tea light underneath or switch on, whichever is appropriate, and that's it!
4) Are the Scented Crystals biodegradable?
Biodegradability This product is soluble in water and has no potential for bio-accumulation.