To unclog a vacuumcleaner .... first try putting your hand over the nozzle ... sometimes this extra suction caused by blocking the opening, will force it to unclog and suck the debris into the trash section of the vaccumcleaner.
IF that does not work ... turn the unit off and gently tap the hose on the inside of your trash container to try to jar what is clogging it up loose.
IF that does not work, place your vacuum cleaner outside and connect the hose to the exhaust, instead of it's normal suction connection ... while holding the nozzle away from you (and anyone/thing else that might be around), turn the vacuum cleaner back on ... this should blow the clog (and lots of extra dirt and dust) out the other end. (This is why you do it outside the house, not inside the home.)
IF that does not work, try to gently, but firmly, to push it out or break up the clog with the use of a broom or mop handle ... caution: this last action could damage the hose if you do not do it properly, so be careful or let someone else try it for you.
A replacement vacuum cleaner ... hummmmmmmmmm ... I use a Shop-Vac ... they work wonders for cleaning up after chins, kids and messy people.
They are also able to clean up liquid spills.
When you empty a vacuum cleaner, regardless of the style, always try to do so outside ... otherwise, you are just putting pollutants back into the air in your home, even if you don't see them.
Jo Ann