You need your longstanding product issues to be resolved to protect your reputation and bottom line. You’re probably holding some stock of product or need to continue fulfilling orders.
These can make a complete re-design unappealing. We can work with you to fully understand the faults you are experiencing and minimise any hardware modifications (wires, track cuts, component value changes) to a minimum.
It may be that the issues can be worked around in software instead.
The solutions depend upon the nature and severity of the problem and may consciously leave lower risk or less irritating issues in the product to strike a careful balance between fix and commerciality.