is there any special way to wash gloss blk rims to keep its gloss, or just use soap and water??

 

yup just soap and water

 

wash with soap and water... other than that treat them like the paint on your car. Wheels that have clearcoat (like yours apparently) dont do well with harsh chemicals. Put a good coat of wax on them every once in a while (yes you CAN wax wheels) and use mild carwash soap, no degreasers.