1. Run the strap under water, getting it completely wet before putting it on. 

2. To help maintain the electrical connection between your body and the strap in cold or windy environments, or at times when you may not be producing enough perspiration, try to maintain the moisture on the electrodes using water or saliva. 
3. Make sure the strap is worn snug and not allowed to slide down your body. 
4. Warm up for 5–10 minutes before an activity.

5. Try wearing a cotton shirt. If you wear a shirt with synthetic fabrics, it can rub or flap against the HRM creating static electricity which can interfere with HR signals. If you decide to wear a "tech" shirt try wetting your shirt. 
6. Avoid strong electromagnetic fields and 2.4 GHz wireless sensors, such as high voltage power lines, microwave ovens, 2.4 GHz cordless phones, and other wireless access points. 
7. Improper care of the Premium HRM can cause permanent damage. Review the HRM user manual for more detail. 
8. Medicine, such as Beta blockers, and devices, such as pacemakers or implantable cardiac defibrillators could potentially interfere with HRM readings. Consult a physician regarding this possibility and for possible solutions. 
9. For HRMs that have a removable module, ensure the module is cleaned and dried regularly after use to avoid the buildup of rust and corrosion. Also, ensure that while wearing the strap, the module and strap are in the correct, right side up, orientation. 
10. If the electrodes are allowed to dry out, the strap 10.5 may lose the heart rate signal and possibly lock onto your running cadence instead.