How to Clean or Restore Needlepoint

Cleaning and restoring needlepoint is a specialty art.  If you need something cleaned, don't take it to the dry cleaners unless you know they are experienced in handling needlepoint and other specialty textiles.

You can sometimes find help at a museum if you are in a large city.  There are online tips as well.  Here is what the Museum Conservation Institute says about textiles.
https://www.si.edu/mci/english/learn_more/taking_care/handletex.html

Information from the Smithsonian.
https://www.heinzhistorycenter.org/blog/conservation-and-care/how-to-care-for-textiles

Information from the Victoria and Albert.
http://www.vam.ac.uk/content/articles/c/cleaning-textiles/

You can download care tips for textiles here and...
https://learning.culturalheritage.org/caring-treasures

…you can also look for an expert to hire.
https://www.culturalheritage.org/membership/find-a-conservator

Nancy Lukofski and Melissa Beck are experts on needlepoint conservation and cleaning.  The first link below has some tips from Nancy about cleaning soiled needlepoint.  Amy Bunger took a class with her and wrote it up.  The second link is an interview with Melissa.
https://chillyhollownp.blogspot.com/p/how-to-clean-or-restore-needlepoint.html

https://chillyhollownp.blogspot.com/2017/07/fiber-talk-interviews-melissa-beck.html