diff --git a/miscplot/variability.py b/miscplot/variability.py
index b380aac..20c3c01 100644
--- a/miscplot/variability.py
+++ b/miscplot/variability.py
@@ -59,9 +59,9 @@ def variability_plot(
     vert_groups = set(vert_groups)
 
     df = polars.DataFrame(data_table)
-#       zero_bad: bool = True,
-#    if zero_bad:
-#        df.filter(col(data_col) != 0)
+
+    # Drop nulls and nans so that the boxplots don't disappear
+    df = polars.drop_nulls(subset=[data_col]).drop_nans(subset=[data_col])
 
     df = df.sort(groups)
     df_groups = df.select(groups).unique(maintain_order=True).with_row_index(name='x_pos')