diff --git a/cisticola/base.py b/cisticola/base.py
index 28ff9f8..5d0c12f 100644
--- a/cisticola/base.py
+++ b/cisticola/base.py
@@ -11,7 +11,7 @@ import pytesseract
 import PIL
 import exiftool
 import re
-from langdetect import detect, DetectorFactory
+from langdetect import PROFILES_DIRECTORY, DetectorFactory
 from langdetect.lang_detect_exception import LangDetectException
 from loguru import logger
 import spacy
@@ -165,6 +165,15 @@ nlp_ru = spacy.load('ru_core_news_sm', disable=['parser', 'tok2vec', 'attribute_
 nlp_nl = spacy.load('nl_core_news_sm', disable=['parser', 'tok2vec', 'attribute_ruler'])
 nlp_xx = spacy.load('xx_ent_wiki_sm')
 
+factory = DetectorFactory()
+factory.load_profile(PROFILES_DIRECTORY)
+detector = factory.create()
+
+def detect(text, detector=detector):
+    detector.text = ""
+    detector.append(text)
+    return detector.detect()
+
 @dataclass
 class Post:
     """An object with fields for columns in the analysis table"""
diff --git a/cisticola/transformer/base.py b/cisticola/transformer/base.py
index 32ed37c..6b85b80 100644
--- a/cisticola/transformer/base.py
+++ b/cisticola/transformer/base.py
@@ -192,22 +192,25 @@ class ETLController:
         session = self.session()
 
         BATCH_SIZE = 50000
-        offset = 0
-        batch = []
+        batch = (session.query(ScraperResult)
+                    .join(Post, isouter=True)
+                    .where(Post.raw_id == None)
+                    .order_by(ScraperResult.date.asc())
+                    .limit(BATCH_SIZE)
+                ).all()
 
-        query = (session.query(ScraperResult)
-            .join(Post, isouter=True)
-            .where(Post.raw_id == None)
-            .order_by(ScraperResult.date.asc())
-        )
+        while len(batch) > 0:
+            logger.info(f"Fetching untransformed posts batch of {BATCH_SIZE}")
 
-        while len(batch) > 0 or offset == 0:
-            logger.info(f"Fetching untransformed posts batch of {BATCH_SIZE}, offset {offset}")
+            batch = (session.query(ScraperResult)
+                    .join(Post, isouter=True)
+                    .where(Post.raw_id == None)
+                    .where(ScraperResult.date >= max(batch, key=lambda v: v.date).date)
+                    .order_by(ScraperResult.date.asc())
+                    .limit(BATCH_SIZE)
+                ).all()
 
-            batch = query.slice(offset, offset + BATCH_SIZE).all()
-            offset += BATCH_SIZE
-
-            logger.info(f"Found {len(batch)} items to ETL ({offset} already processed)")
+            logger.info(f"Found {len(batch)} items to ETL")
 
             self.transform_results(batch, hydrate=hydrate)
 
@@ -233,8 +236,8 @@ class ETLController:
                         session.commit()
                         break
 
-                    if handled == False:
-                        logger.warning(f"No Transformer could handle raw channel info ID {result.id} with platform {result.platform} ({result.date_archived})")
+                if handled == False:
+                    logger.warning(f"No Transformer could handle raw channel info ID {result.id} with platform {result.platform} ({result.date_archived})")
 
 
     @logger.catch(reraise=True)