title: Seaborn heatmap overlaps with previous data
body: <p>I have a pandas df which I wanted to color code so I used seaborn heatmap to get it done. Works fine for most of the part. But when I create multiple plots, it overlaps with earlier ones.</p>
  
  <p><a href="https://i.stack.imgur.com/JlXfF.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/JlXfF.png" alt="SNS PLOT"></a></p>
  
  <pre><code>p = sns.heatmap(df, annot=True, linewidths=0.3, cmap='RdYlGn').set_title(title)
  pl = p.get_figure()
  pl.tight_layout()
  pl.set_size_inches(dim)
  pl.savefig(img_name)
  </code></pre>
  
  <p>This happens when I run this code on multiple dfs or run it with the same df multiple times.</p>