diff --git a/daq/src/aaredaq/daq.py b/daq/src/aaredaq/daq.py
index e7b7e5db..10699c07 100644
--- a/daq/src/aaredaq/daq.py
+++ b/daq/src/aaredaq/daq.py
@@ -311,6 +311,10 @@ class AareDAQ:
             curr_sample = self.__cfg.current_sample
             curr_sample_is_manual = False
 
+            self.crystal_size = CrystalSize(x=0, y=0, z=0)
+            self.last_best_b_factor = None
+            self.last_best_res = None
+
             if curr_sample is not None and curr_sample.location is None:
                 self.__cfg.current_sample = None
                 curr_sample_is_manual = True