...also my SWR needle does not move...
Does this mean that the SWR needle does not move AT ALL (which means either the SWR is
always perfect, or the meter isn't working) or that the reflected power doesn't CHANGE over
time after keying the transmitter?
This is a critical piece of evidence for determining where the problem is.
If there is a fault in the antenna that is causing the transmitter power to drop over time,
it would most likely show up as a high SWR at the rig. If the SWR meter is working, but
not showing a high SWR, then we'd have to find some other explanation for the problem.
(Perhaps RF feedback.) But if the rig is cutting back power due to a SWR that drifts higher
over time, that could be due to a poor or intermittent connection in one of the traps
(likely the output side of the last trap) or somewhere else in the antenna.
In that case, it probably wouldn't hurt to take the covers off the traps in the driven element
and give them a visual inspection. If it is a corroded joint it may show up with an ohmmeter
check, but being intermittent you can't be sure you'll catch it.