diff --git a/src/gui_qt/lib/spinboxes.py b/src/gui_qt/lib/spinboxes.py
index dfaced2..5ba041d 100644
--- a/src/gui_qt/lib/spinboxes.py
+++ b/src/gui_qt/lib/spinboxes.py
@@ -34,9 +34,9 @@ class SciSpinBox(QtWidgets.QDoubleSpinBox):
 
         new_value = self._prev_value
         if new_value != 0.0:
-            new_value *= 10**(step/19.)
+            new_value *= 10**(step/99.)
         else:
-            new_value = 0.001
+            new_value = 0.00001
 
         self.setValue(new_value)
         self.lineEdit().setText(f'{new_value:.3e}')