Joe, I usually don't bother deep cleaning my White Dot. I do clean it after bowling with a good cleaner though. My high-end equipment I tend to deep-clean once during the middle of the season, and once at the end of the season. I use the Dawn and hot water method. Here are the steps:
1 Cover all of the holes with tape, I usually use small pieces of duct tape.
2 Fill a large bucket with hot water. (I wouldn't use anything above 120 deqrees.)
3 Place the bowling ball in the bucket and make sure it is completely covered with water.
4 Add 3 tsp. of Dawn dish detergent and mix it with the hot water in the bucket.
5 Use your hands to rub the dish detergent all over the bowling ball.
6 Let the bowling ball sit in the bucket for 3 to 4 minutes.
7 Use a towel to wipe down the bowling ball while it is still under water.
8 Take the bowling ball out of the bucket and rinse it under your faucet with hot tap water.
9 Fill a second bucket with hot water and place the bowling ball back in it. You may see a soapy film in the water. This means there is still some soap left on the bowling ball. You will need to rinse it off again and stick it in a new bucket of hot water. When you no longer see the soapy film, the bowling ball is clean.
One other thing, since the coverstock is porous the ball will absorb some water. Give it a couple of days for it to dry completely. I've been toying with the idea of placing the ball into an absorbent powder to wick out the moisture after washing my balls.