Roll axis spikes on Warthog with Gunfighter base

[Fry777]

Hello VKB team,

I have purchased a VKB-Sim Gunfighter Base and TM Warthog Adaptor back in 2017.
Recently in MSFS 2020 I've been seeing spikes in the roll axis (the yoke in the cockpit "jumps" very quickly between roll positions, but only in roll, never in pitch). I upgraded the firmware and reset the parameters in VKBDevCfg-C but the issue still persists.
I started Joytester and immediately saw the problem (Here are screenshots from the Joytester showing the spikes).
Is there a solution to this problem ? Thank you

[Victorus]

Try to calibrate axis. For beginning.
Also you can unscrew cower and check MARS sensor connectors.

[Fry777]

I recalibrated several times already, I did it again after your reply but no change.

What do the MARS sensors look like ? What should I see if there is a problem ?

[Ron61]

Check out this thread.