diff --git a/bin/mashtree.pl b/bin/mashtree.pl
index 7b345e6..2774a95 100755
--- a/bin/mashtree.pl
+++ b/bin/mashtree.pl
@@ -151,7 +151,7 @@ sub mashSketch{
 
   # If any file needs to be converted, it will end up in
   # this directory.
-  my $tempdir=tempdir("$$settings{tempdir}/convertFasta.XXXXXX", CLEANUP=>1);
+  my $tempdir=tempdir("$$settings{tempdir}/convertSeq.XXXXXX", CLEANUP=>1);
 
   my @msh;
   # $fastq is a misnomer: it could be any kind of accepted sequence file
@@ -163,20 +163,24 @@ sub mashSketch{
     my $unzipped="$tempdir/".basename($fastq);
     $unzipped=~s/\.(gz|bz2?|zip)$//i;
     my $was_unzipped=0;
-    if($fastq=~/\.gz$/i){
-      system("gzip  -cd $fastq > $unzipped");
-      die "ERROR with gzip  -cd $fastq" if $?;
-      $was_unzipped=1;
-    } elsif($fastq=~/\.bz2?$/i){
-      system("bzip2 -cd $fastq > $unzipped");
-      die "ERROR with bzip2 -cd $fastq" if $?;
-      $was_unzipped=1;
-    } elsif($fastq=~/\.zip$/i){
-      system("unzip -p  $fastq > $unzipped");
-      die "ERROR with unzip -p  $fastq" if $?;
-      $was_unzipped=1;
+    # Don't bother unzipping if it's a fastq file b/c Mash can read those
+    if(!grep {$_ eq $fileExt} @fastqExt){
+      if($fastq=~/\.gz$/i){
+        system("gzip  -cd $fastq > $unzipped");
+        die "ERROR with gzip  -cd $fastq" if $?;
+        $was_unzipped=1;
+      } elsif($fastq=~/\.bz2?$/i){
+        system("bzip2 -cd $fastq > $unzipped");
+        die "ERROR with bzip2 -cd $fastq" if $?;
+        $was_unzipped=1;
+      } elsif($fastq=~/\.zip$/i){
+        system("unzip -p  $fastq > $unzipped");
+        die "ERROR with unzip -p  $fastq" if $?;
+        $was_unzipped=1;
+      }
     }
 
+    # If the file was uncompressed, parse the filename again.
     if($was_unzipped){
       $fastq=$unzipped;
       ($fileName,$filePath,$fileExt)=fileparse($fastq,@fastqExt,@fastaExt,@richseqExt,@mshExt);
@@ -244,6 +248,8 @@ sub mashSketch{
     push(@msh,"$outPrefix.msh");
   }
 
+  system("rm -rf $tempdir");
+
   return \@msh;
 }
 
@@ -334,6 +340,8 @@ sub mashDist{
   # this sub ends but I wanted to do it directly and
   # in a readable fashion.
   $mashtreeDb->disconnect();
+  close($distFileFh);
+  unlink($distFile);
 }
 
 sub determineMinimumDepth{
diff --git a/lib/Mashtree.pm b/lib/Mashtree.pm
index 18f36d6..63a5418 100644
--- a/lib/Mashtree.pm
+++ b/lib/Mashtree.pm
@@ -24,7 +24,7 @@ local $0=basename $0;
 ######
 # CONSTANTS
 
-our $VERSION = "0.21";
+our $VERSION = "0.22";
 our $MASHTREE_VERSION=$VERSION;
 our @fastqExt=qw(.fastq.gz .fastq .fq .fq.gz);
 our @fastaExt=qw(.fasta .fna .faa .mfa .fas .fsa .fa);