I have a great tip for you! Just use oil in the lids. Here is a tutorial.
|1. Take the lids off of the glue and put into a bowl.|
|2. Add 2 tablespoons of oil (any kind) to your bowl of lids. Get the oil inside the lids too!|
|3. Rinse the lids. Don't worry about getting all of the oil off. It works in your favor!|
|4. Put the lids on and enjoy clog free glue!|
Source: What The Teacher Wants