You shower everyday, you brush your teeth everyday, you maintain your immune system by taking vitamins and eating the right kind of foods. You attend to your body's needs to stay healthy and hygienically clean. It is same with spiritual maintenance. Your human body is an amazing transmitter and receiver of energy. You must develop a balanced and practical routine of maintaining a healthy spiritual hygiene. This will help to protect you from adverse energy that is not authentically yours.
The foremost is you must trust your intuition. If you are reading or listening to something or connecting to a channeled energy, and it doesn't feel right, trust your feelings and stop. You may not know why you feel off with it and that's ok. What's most important is to trust your intuition to disconnect. You are in control of this, it must pass your "smell" test. Trust your inner guidance to tell you when it is safe to proceed. One reliable way I do this, is through prayers. I check within myself first to notice if it is my emotions that are coming forth and if it isn't, I pray to the highest self to give me the courage to step away.