diff --git a/README.md b/README.md
index 9a575ce..5329d94 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-# Workstation Housekeeping v1.7
+# Workstation Housekeeping v1.8
 
 Scripts to manage data on the NGS workstation
 
@@ -62,7 +62,6 @@ wscleaner --version # Print version number
 ### Usage
 
 ```bash
-wscleaner --set-key DNA_NEXUS_KEY # Cache dnanexus api key
 wscleaner ROOT_DIRECTORY --logfile LOGFILE_PATH
 ```
 
diff --git a/wscleaner/DESIGN.md b/wscleaner/DESIGN.md
index 8259925..676c413 100644
--- a/wscleaner/DESIGN.md
+++ b/wscleaner/DESIGN.md
@@ -29,4 +29,4 @@ NF4. Attempt to process all folders at least once
 
 A RunFolderManager class will instatiate objects for local Runfolders, each of which has an associated DNA Nexus project object. The manager loops over the runfolders and deletes them if all checks pass.
 
-DNA Nexus projects are accessed with the dxpy module, a python wrapper for the DNA Nexus API. Credentials are cached locally using the command-line option '--set-key'.
+DNA Nexus projects are accessed with the dxpy module, a python wrapper for the DNA Nexus API.
diff --git a/wscleaner/README.md b/wscleaner/README.md
index 91c17fb..a19d3af 100644
--- a/wscleaner/README.md
+++ b/wscleaner/README.md
@@ -21,28 +21,31 @@ wscleaner --version # Print version number
 ## Quickstart
 
 ```bash
-wscleaner --set-key DNA_NEXUS_KEY # Cache dnanexus api key
 wscleaner ROOT_DIRECTORY
 ```
 
 ## Usage
 
 ```
-wscleaner   [-h] [--set-key SET_KEY] [--print-key] [--dry-run]
-            [--logfile LOGFILE] [--min-age MIN_AGE] [--version]
-            root
+usage: wscleaner [-h] [--auth AUTH] [--dry-run] [--logfile LOGFILE]
+                 [--min-age MIN_AGE] [--logfile-count LOGFILE_COUNT]
+                 [--version]
+                 root
 
 positional arguments:
-  root               A directory containing runfolders to process
+  root                  A directory containing runfolders to process
 
 optional arguments:
-  -h, --help         show this help message and exit
-  --set-key SET_KEY  Cache a DNA Nexus API key
-  --print-key        Print the cached DNA Nexus API key
-  --dry-run          Perform a dry run without deleting files
-  --logfile LOGFILE  A path for the application logfile
-  --min-age MIN_AGE  The age (days) a runfolder must be to be deleted
-  --version          Print version
+  -h, --help            show this help message and exit
+  --auth AUTH           A text file containing the DNANexus authentication
+                        token
+  --dry-run             Perform a dry run without deleting files
+  --logfile LOGFILE     A path for the application logfile
+  --min-age MIN_AGE     The age (days) a runfolder must be to be deleted
+  --logfile-count LOGFILE_COUNT
+                        The number of logfiles a runfolder must have in
+                        /Logfiles
+  --version             Print version
 ```
 
 ## Test