If your Philips vacuum is a bagged model, then read here how to clean the following filter:
• Motor protection filter:
The motor protection filter is usually located in or behind the dust container. Please check the images below for some examples.
This filter consists of two different parts: A) A plated part (called a HEPA/EPA or allergy filter) and B) a foam part:
A) The plated part (EPA/HEPA or allergy filter) cannot be washed. You can clean it by tapping it over a bin or brushing it.
B) The foam part can be washed with water. It needs to be fully dry before you can place it back in the vacuum