diff --git a/compress_logger/lz4.py b/compress_logger/lz4.py
index 0908b1e..b9037e8 100644
--- a/compress_logger/lz4.py
+++ b/compress_logger/lz4.py
@@ -16,11 +16,15 @@ COMPRESS = 1
 EXPAND = 2
 
 
+def get_trash(instrument):
+    return os.path.expanduser(f'~/sea_logger_trash_{instrument}')
+
+
 def treat(instrument, yearlimit):
+    trash = get_trash(instrument)
     logbase = '%slogger/' % instdir(instrument)
     os.chdir(logbase)
     print('chdir', logbase)
-    trash = '../loggertrash'
     os.makedirs(trash, exist_ok=True)
     for ynum in range(2007, 2040):
         year = str(ynum)
@@ -105,6 +109,6 @@ if __name__ == '__main__':
         treat(instrument, year)
     print('if you are sure nothing is lost, you may delete loggertrash:')
     for instrument in instruments:
-        tr = instdir(instrument) + 'loggertrash'
-        print(f'  rm -r {tr}')
+        trash = get_trash(instrument)
+        print(f'  rm -r {trash}')