Abstract: The present invention is a moisture-detecting apparatus for bill validators and coin mechanisms used in vending machines. Vandalism by "salting" of these types of machines results in loss of product, monies, and damage to the mechanisms. Therefore the reason for the present invention. Which consist of moisture-detecting probes and the ability to instantly shut off the logic lines and power to the bill validator, stopping damage to the bill validator, power supply, and coin mechanism power side. Thereby stopping the "jack pot" rejecting effect of coins, and the free vending of products, when moisture is detected.