B&W4 Quarterly Cleaning Kit

This is certainly affecting the performance of your machine, the quality of your drink and the perception of your business to customers. It can also cause the following issues:

Drinks that pour inconsistently e.g. only one spout dispensing, too fast, too slow.
Build-up of scale leading to a machine that runs inefficiently.
Poor quality drinks

Put the machine on a clean cycle. Clean the hopper(s). Clean machine parts thoroughly.
Clean everything in your baristas work space, and everything the customer can see. Check your water filter is effective and replace as required