MSP-FET: Not recognizing microcontroler and other issues

Part Number: MSP-FET

Tool/software:

Hi experts.

I´ve been using MSP-FET FLASH EMULATION TOOL for a while, and it's been my programming tool for all the project I've worked; nevertheless, there´s an unresolved issue which concerns my team and I, and is the fact that, after a while, each MSP-FET I've used, has presented issues and stop letting me use them, it stops working and recognizing microcontrolers, starts giving high tool voltages (up to 5v, even when I set it on 3v), it stops letting me debug, and then, I've to buy another one in order to keep working.

This concerns me, and makes me think:

1.- Can I use this tool in my process of design, verification and production? Is it suitable for constant use?

2.- Is there anything I can do to "repair" my MSP-FETs in order to keep using them?

3.- Is there a time-life usage for this tool?

4.- Does this tools have any kind of guarantee?

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