google speedtest has problems with share-this

When I turn off share-this, I actually end up with a 99/100 on my speed score. Turning on share-this drops me to 90.

Here are the problems with share this via google:

–

Leverage browser caching

The following cacheable resources have a short freshness lifetime. Specify an expiration at least one week in the future for the following resources:
https://s.sharethis.com/loader.js (expiration not specified)
https://sd.sharethis.com/disc/css/serviceWidget-facebook-style3.css (expiration not specified)
https://sd.sharethis.com/disc/images/facebook_share_sprite_style3.png (expiration not specified)
https://sd.sharethis.com/disc/js/serviceWidget.js (expiration not specified)
https://connect.facebook.net/en_US/all.js (18 minutes)
https://platform.twitter.com/anywhere.js?id=XpCaHUxBsj5IwxhHwtDY1w&ver=2.5 (30 minutes)
https://apis.google.com/js/plusone.js (30 minutes)
https://www.google-analytics.com/ga.js (12 hours)

–

Serve resources from a consistent URL

The following resources have identical contents, but are served from different URLs. Serve these resources from a consistent URL to save 1 request(s) and 25.2KiB.
https://static.ak.facebook.com/connect/xd_arbiter.php?version=11
https://s-static.ak.facebook.com/connect/xd_arbiter.php?version=11

–

Specify a cache validator

The following resources are missing a cache validator. Resources that do not specify a cache validator cannot be refreshed efficiently. Specify a Last-Modified or ETag header to enable cache validation for the following resources:
https://sd.sharethis.com/disc/css/serviceWidget-facebook-new.css
https://sd.sharethis.com/disc/css/serviceWidget-facebook.css
https://w.sharethis.com/button/buttons.js
https://w.sharethis.com/button/css/buttons.f48d075cabb93f026d23cf2c20db30d0.css
https://w.sharethis.com/images/check-big.png
https://w.sharethis.com/images/email_counter.png
https://w.sharethis.com/images/facebook_counter.png
https://w.sharethis.com/images/pinterest_counter.png
https://w.sharethis.com/images/sharethis_counter.png
https://w.sharethis.com/images/twitter_counter.png
https://w.sharethis.com/share5x/css/share.a88388610c314ef1aa0cbe5856d5e6d8.css
https://w.sharethis.com/share5x/js/st.e188d8d02a70c391dfeb36d4bfc5cb4d.js
https://w.sharethis.com/share5x/js/stcommon.b49c7bad5e027ec1e9e7c70636b37ade.js

Is there anything I can do, short of removing the plugin to fix these problems?

Are the authors even aware of these problems prior to this report, if so, are there docs I can follow to fix the code?

thanks

https://www.ads-software.com/extend/plugins/share-this/