The temperature differences can mean the rubber slightly expands or contracts due to temperature, and thus can cause the problem to either be present (major vacuum leak) or to not be present (
minor vacuum leak).
After eliminating everything else I concluded that this is due to
a minor vacuum leak.
Not exact matches
Much quieter than the
vacuum cleaner, first use had a very
minor dust
leak at bin lid edge though none after that.
While this technology was originally developed for the detection of
leaks in a
vacuum chamber, with some
minor modification and training, ConEd's employees have successfully used it for SF6
leak detection.