Trackpad started acting jittery

Hardware
1

Over the last two days the trackpad on my Librem 15v3 has started acting jittery. Moving the cursor and clicking used to work well. Now the cursor jumps while I move it, make it difficult to target. The trackpad sometimes interprets clicks when I haven’t clicked (it didn’t do this before).

I keep PureOS regularly up-to-date, but I assume this isn’t a software issue. Any suggestions?

$ sudo libinput list-devices
Device:           ETPS/2 Elantech Touchpad
Kernel:           /dev/input/event5
Group:            7
Seat:             seat0, default
Size:             98x67mm
Capabilities:     pointer gesture
Tap-to-click:     disabled
Tap-and-drag:     enabled
Tap drag lock:    disabled
Left-handed:      disabled
Nat.scrolling:    disabled
Middle emulation: disabled
Calibration:      n/a
Scroll methods:   *two-finger edge 
Click methods:    *button-areas clickfinger 
Disable-w-typing: enabled
Accel profiles:   none
Rotation:         n/a
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2

There was no visible dirt, but I gave the trackpad a thorough wipe with a dry cloth and this resolved the issue.

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