Does the load capacity of the suction cup change over time?

We repeatedly carry out load tests on suction cups as part of the product monitoring obligation.
In this test, a 5-year-old vacuum cleaner that was also in use was tested for its load-bearing capacity. We have recorded this on video.
Vacuum lifting devices should always be able to hold double the nominal load according to EU standard EN 13155. For this to be achieved, the individual suction cup must also have a sufficient carrying capacity.
However, the time across which this load should be held is not exactly defined. However, the device should be able to hold the nominal load for 5 minutes if the power fails.
We therefore perform this test with a time of 5 minutes.
See the results for yourself.
Now you know why replacing the suction cups is so important after a while.