Looking at the Detox presets for contact treatment, it's not clear which one you're using. The selection is different from the remote set of detox presets.
You could also try reducing the voltage. Or if you're using a Spooky Boost, try the output for colloidal silver. Some people think they need to feel the zap of contact treatment, but I've used it effectively for GeneratorX biofeedback hunt and kill where you don't use a Boost and don't "feel" anything and still got results.
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