How do I make a homemade enema solution?

Homemade enemas can be made with clean distilled water mixed with other substances, such as glycerin, bisacodyl, sodium phosphate, or mineral oil. However, some ingredients might not be well-tested for safety and efficacy or might already be considered unsafe. For example, coffee enemas are often self-administered as a way to clean your colon, but there is no evidence that they are safe and effective.