Summer time and high Hummidy reduce the chance of ESD damage.
Winter time and Low Humidity the possibility of damage skyrockets. In Fact you do NOT even have to touch, just bring your pinky next to a component to cause damage - the EM field can do it!http://www.descoindustries.com/pdf/CostofESDDamage.pdfhttp://www.static-sol.com/library/articles/ESD_damage.htm
However, many ESD events occur without a visible or audible spark. A person carrying a relatively small electric charge may not feel a discharge that is sufficient to damage sensitive electronic components. Some devices may be damaged by discharges as small as 10 V. These invisible forms of ESD can cause outright device failures, or less obvious forms of degradation that may affect the long term reliability and performance of electronic devices. The degradation in some devices may not become evident until well into their service life.
"Ps, every time some one comes to my shop and buys one of those anti-static wrist guards a laugh inside"
Thanks, I know where NOT to buy from. You really need to take a class on ESD.