Here’s what you need to know to take this task from tedious to easy.
Cleaning those burnt, greasy cups might make you want to give up and chuck them away altogether.

No. You do not need to do that and buy new ones next year.
Instead, just read on here.

All you need is a bit of ammonia, some water, and some time.
Find a container that is large enough to hold all your menorah glasses. You want something made out of hard plastic or glass (we used a Pyrex bowl).

Next, place all the glasses in there, add some warm water, and about ¾ cup of ammonia. Any ammonia will do (any color, scent, or brand). Let this mixture soak, preferably overnight.
You want to store this in a well ventilated area or preferably a garage or something like that. Otherwise leave it next to an open window. (Ammonia is dangerous to inhale.)

Once the ammonia did its job you can either place the glasses in the dishwasher (top rack) or wash with hot soapy water.

You will be amazed! Sparkling glass, good as new!
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You can fill a bowl with hot water and sprinkle a little laundry detergent in the water. Let glasses soak overnight in bowl. Rinse the next day….results:….As good as new!!!!!!
Yes! I do that with oxi powder. Works like a dream and doesn’t smell like ammonia
I use Lestoil and hot water. Soak overnight and rinse. Works like magic
To store if you don’t have the box and foam the glasses came in an empty egg carton works great.
How to get wax off menorah???
Buy a cheap hairdryer. best way to clean leichter etc.
melt the wax & blot with a soft cloth
Boiling water works great too!
does this work for the neironim glasses too?
To get any burnt residue off neironim glasses, just use steel wool, it shouldn’t scratch the glass and it will look as good as new after a few seconds!
If you use these metal wick holders, you wont even have issues with the black. Game changer!
https://www.judaica.com/wax-coated-wicks-and-metal-holders-18672.html
Soak the glasses overnight with tide powder in water
i found it took just abt a minute to wipe it clean with a wet wipe
Thank you so much!!!
FYI my rav said putting glasses with leftover menorah oil in dishwasher is a Kashrus issue.