If the air grill on your bathroom or any other extractor fan is clogged with dust, try a trick that’s faster and more effective than vacuuming.
Turn on the fan and blast out the dust with canned air. The fan will blow the dust outside. This works on air grills where you have access to them. You’ll find canned air at large DIY stores, hobby stores and electrical suppliers.
Caution: The cans contain chemical propellants, not just air. Keep away from children