Thermal artifacts are easily measured in dielectric-loss spectroscopy due to its high sensitivity. These arise from transient changes in the dielectric properties of the solvent as a function of local temperature. Since the TRDL signal is proportional to the concentration of the excited species, small thermal changes in the solvent easily overwhelm larger changes in the solute properties. To minimize this, TRDL must be performed in low dielectric-constant solvents so that thermally-induced changes in its dielectric constant also remain small. For all of the work in this paper, 1,4-dioxane has been used as it has shown no evidence of thermal artifacts in TRDL transients.