What Are “mainly triggered by soap handling and random jerks“? That is the question.
A clean answer may, perhaps, appear in the study: “A Robust Device for Large-Scale Monitoring of Bar Soap Usage in Free-Living Conditions,” Rüdiger Zillmer, Richard Wright, Susan Bates, and Ian Mahers, Personal and Ubiquitous Computing, vol. 18, no. 8, 2014, pp. 2057-2064. The authors explain:
“False activations are mainly triggered by soap handling and random jerks…”