My Festool Vacuum seems to have less suction than it did before.

A full dust bag, blocked hose or clogged filter can reduce the suction. Therefore empty the dust bag, free up the hose or clean the filter to improve the suction of the machine.

Check if the hose is blocked and clear any debris.

Another troubleshooting method is to check if the filter is clogged by shaking/tapping/vacuuming the filter. 

If your extractor still appears to be lacking suction
please contact Festool service to have your extrator looked at by a Festool technician.