We present twelve years of monitoring of the gravitational lens Q0142-100 from the Teide Observatory .
The data , taken from 1999 to 2010 , comprise 105 observing nights with the IAC80 telescope .
The application of the \delta ^ { 2 } -method to the dataset leads to a value of the time delay between both components of the system of 72 \pm 22 days ( 68 per cent confidence level ) , consistent within the uncertainties with the latest previous results .
With this value in mind a possible microlensing event is detected in Q0142-100 .