Electrospray thrusters were first operated in space in 2015 as the technology demonstration of the Colloid MicroNewton Thrusters (CMNTs), developed by Busek Co., Inc. and NASA Jet Propulsion Laboratory (JPL) for the European Space Agency (ESA) Laser Interferometer Space Antenna (LISA) Pathfinder mission [1][2]. The CMNTs demonstrated key mission capabilities such as micronewton thrust precision and low thrust-noise. Seven of the eight CMNTs operated in space for over 2,400 hours and a ground-based test ended after 3,400 hours without failure. The LISA mission requires nearly 40,000 hours of operational lifetime, and 60,000 hours for the extended mission. Therefore, understanding life-limiting mechanisms in electrospray thrusters is necessary to improve their viability for LISA and other future missions. The LISA Colloid Microthruster Technology (CMT) development plan, described by Ziemer, et al.[3], is using lessons-learned, trade studies, and physics-based modeling to predict the performance and lifetime of the LISA CMT and guide system design. As part of the CMT development plan, researchers from the University of California, Los Angeles (UCLA) Plasma & Space Propulsion Lab have undertaken a multi-faceted campaign to investigate CMT performance and life.