If I understand the situation, this was NOT an issue with a prior cartridge, but, it is an issue with the Lyra Argo. If that is the case, it may be the case that the Lyra's aluminum body is part of the conductive pathway. In that case, you may be able to do something with plastic screws, but, depending on how conductive is the headshell and the body of of the Lyra, you may also have to put some kind of barrier between the cartridge and the body. Keep in mind that the Lyra body is designed to make a very tight physical contact with the headshell in order to effectively drain vibrational energy from the cartridge into the arm for dissipation by the arm. That "insulation" might compromise that objective.
In short, I would go with Lewm and consider insulation of the armlift as a permanent solution.
In short, I would go with Lewm and consider insulation of the armlift as a permanent solution.