Drain unblocking
You can see the obstruction through the transparent pipe. If you are able to move it, do it little by little until it comes out of the drain hole and makes sure it doesn't happen again using rags or other methods. Check if there is any other sludge in the pipe, stuck under the obstacle. Use a magnet to collect any coin or piece of metal. Check to see if the standing water does not contain hazardous materials such as toxic chemicals or broken glass. If no hazardous material is found, unblock the passage using a plug and wash the area outside with clean water from your garden hose. Make sure your power supply is working normally then plug in the wet and dry vacuum cleaner. Now insert the large end of the wet and dry vacuum cleaner into the exhaust port. Close the port with putty and/or duct tape to prevent water from leaking from the hose. Insert a release tablet in the drainpipe for 20 to 30 cm (8 to 12 inches). Release tablets are available at hardware stores or supermarkets. Run the small pipe towards obstruction until you find a solution. For example, if the obstruction is a soap film, water will flow from the small pipe. If you see any obstructions, direct a stream of water through the nozzle or by placing your thumb on one end of the hose and unblocking the plug. The obstruction should then move towards the larger diameter hose where it can be sucked into the vacuum. Then use compressed air or another tool to remove any remaining obstructions. Once all the obstructions have been removed, check that there are no leaks in the pipes, seal any leaks with adhesive tape to complete the job, and prevent any sort of future damage.