diff --git a/app-proto/src/add_remove.rs b/app-proto/src/add_remove.rs
index 573bd36..4972d3c 100644
--- a/app-proto/src/add_remove.rs
+++ b/app-proto/src/add_remove.rs
@@ -148,6 +148,7 @@ pub fn AddRemove() -> View {
             let assembly = &state.assembly;
             
             // clear state
+            assembly.regulators.update(|regs| regs.clear());
             assembly.elements.update(|elts| elts.clear());
             assembly.elements_by_id.update(|elts_by_id| elts_by_id.clear());
             state.selection.update(|sel| sel.clear());