Keep pressing the "Don't remind me again" button. Doesn't do any good.

[john_wade]

I press the button for redundant, wrong item specifics that don't apply to my listings. Usually, several weeks later, I get the same recommendations popping up again. No matter how ,many times I press the button I continue to get multiple questions about the diamonds that do not exist in my costume jewelry. 

[stainlessenginecovers]

Do you happen to clear cookies regularly? 

[rosszonebricks]

Could always use Bulk Editor and just set them all to custom value > NA, and be done with them permanently.

1. Select all items to edit at https://www.ebay.com/sh/lst/active.
2. Choose Edit > Edit Selected.  The Bulk Editor will launch.
3. Check the box to select all.
4. Click Bulk Edit > Item Specifics.
5. Expand the category to edit.
6. Choose the item specific and select Change To.
7. Enter NA in the value field.
8. Click Apply.
9. Click Submit All.

[kathieskorner]

I have found that every time an item is relisted - those unfilled item specifics blanks reset.  I also use the NA solution.

[ajs_coins_and_alchemy]

Usually, if i have 122 or so listings, i have 122 with item specifics recommemded. I ignore them all together and just accept that they aren't going anywhere anytime soon. 

I know this doesnt solve your problem, im just saying i gave up a long time ago.