Having germs in the colon is not a problem. Most of your fecal matter is dead bacteria. Bacteria are supposed to be in the colon. If you eat a lousy diet, the majority of the damage will be done long before the food reaches your colon, and “cleansing” the colon will have a very minimal benefit. Most nutrient absorption takes place earlier in the digestive process, so you’re not preventing your body from absorbing something dangerous by “flushing” it out. Meat doesn’t “rot for 5 years in the colon” and neither does anything else.
Enemas and Weight Loss.
Water enemas are the simplest form of enema you can use. They help clean the colon and soften your stools. Water enemas are often used in hospitals when performing CT scans to distend the area they are viewing to detect what is going on.  
How to make a lemon juice enema solution.
How to make a probiotic enema solution.
How to make a coffee enema solution.
On extreme cases overuse of phosphate enemas in order to treat constipation can lead to a condition called hyperphosphatemia. In this condition in which the blood levels of phosphate salts become elevated.
Also, if you suffer from the symptoms of dehydration, you must contact the doctor immediately. Some common symptoms of diarrhea are dry mouth and constantly feeling thirsty, lack of tears, dizziness, nausea, light headedness, or pale and wrinkled skin.