how do i delete all stored effects?

Here is the step by step procedure for deleting stored effects

This feature will delete all the customized effects, allowing your controller memory to be free, and this can be really helpful if you’re having memory problems when creating a playlist.

Here's how:

• If you want to erase all the effects stored in your memory, you can do it by easily selecting the voice Erase Device Effects, in the settings menu.
• On the home screen, tap on the three lines icon on the left upper corner, and then on the voice Settings.
• Once there, you will find the option Erase device effects.