Libra dosing vessel almost impossible to open
			 
			 
			
		
		
		
		Just wondering if anyone else has this issue, and if so how did you correct it.  I used to be able to easily pop of the lids to refill but they are extremely hard to pry off now. They suction right shut.. I usually need to knock upwards under lid with a hammer. Can I put anything on the inside rubber ring? 
		
	
		
		
		
		
		
	
		
		
	
	
	 |