 
 <prompt> Vaccuums no too good for wet areas like bathrooms or wet floors. Dem fit spoil if dem dey exposed to plenty water. E good make you use mop or wet vacuum cleaner for dis kind areas instead. <response>: Most types of capacitor get dielectric spacer wey dey increase their capacitance. Dis dielectrics dey mostly be insulators. But low capacitance devices dey wey get vacuum between their plates, wey allow high voltage operation and low losses. Variable capacitors wey get their plates open to the atmosphere dey common for radio tuning circuits. Later designs dey use polymer foil dielectric between the moving and stationary plates, with no significant air space between them. 