how to clean egr valve

{"cid":"91191992","title":"Carbon Cleaning System For Cars Trucks Water Electrolyzer EGR Valve Cleaning","imgUrl":"https:\/\/img.chinax.com\/nimg\/26\/e8\/3edc65e93088df0580a9f30358de-200x200-1.jpg","attrs":{"Price":"Negotiate","Brand Name":"Zeayeto","Model Number":"HO-1500","Minimum Order Quantity":"1 Set","Delivery Time":"15 Workdays","Certification":"CE FCC","Place of Origin":"China","Payment Terms":"T\/T L\/C Paypal","Supply Ability":"400 Sets per month","Packaging Details":"Wooden Packaging","Product name":"HHO Carbon Cleaning Machine","Usage":"Hydrogen carbon removal","Vlotage":"AC220V","Color":"Blue","Gas production":"1500 L\/H(adjustable)"}}

{"cid":"91139096","title":"CTI 400ml Carburetor Car Cleaner Spray Aerosol Carb Choke Cleaner Aristo","imgUrl":"https:\/\/img.chinax.com\/nimg\/5a\/41\/50365eb54e6705e52b1f51200d26-200x200-1.jpg","attrs":{"Price":"Negotiation","Brand Name":"Aristo","Model Number":"AA180201","Minimum Order Quantity":"6,000cans","Delivery Time":"Within 45 days after received your payment","Certification":"ROHS\/SGS\/CTI","Place of Origin":"China","Payment Terms":"T\/T or LC at sight","Supply Ability":"2,000,000 per month","Packaging Details":"12cans\/ctn,2550ctns\/20\u2019GP,5700ctns\/40\u2019HQ","Product Name":"Carburetor Cleaner","Content":"400ml","State":"Liquid Coating","Application":"Automotive","Application Method":"Spray","Color":"Clear"}}