Yes it is okay to stretch like that as long as you aren’t forcing too much pressure to the head. Though if you are worried about slipping, why not invest in some gold bond’s powder? The stuff works great for gripping which means you don’t have to place such an emphasis on using the head for leverage and a travel size (which will last a long time) is only 99 cents at Walmart.
Jan. '08:----------------------------------------------------------Feb '19:-----------------------Goal:
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6.5 BP-------------------------------------------------------------8.5 BP-----------------------9.25 BP