The new molecular magnet bis(2,3-dimethylpyridinium) tetrabromocuprate (DIMPY) is a strong-leg spin ladder with a quantum critical point at 3.0(3) T separating a low-field quantum-disordered phase from a high-field Tomonaga-Luttinger Liquid phase. Our original experiment was designed to map out the hitherto unexplored phase diagram of DIMPY. Detailed field and temperature scans show a rich behaviour in relaxation and asymmetry. However, the interpretation of the data is currently hindered by the possible occurrence of level-crossing resonances from states in which the muon couples to part of the group 2,3-dimethylpyridinium. Here we wish to unlock the wealth of data already obtained by performing a short experiment that is specifically targeted to isolate the background contribution from level crossings.